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Civil and Mechanical

Chemistry Quiz

Written by Admin May 31, 2025May 31, 2025

Chemistry Quiz

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Question 1 of 105

1. Question

Which of the following compounds is an example of an electrovalent bond?

NaCl (sodium chloride)
Correct Incorrect Correct answer

CO2 (carbon dioxide)
Correct Incorrect Correct answer

H2O (water)
Correct Incorrect Correct answer

CH4 (methane)
Correct Incorrect Correct answer

Correct

Incorrect
Question 2 of 105

2. Question

One of the active components of baking powder is

MgSO4
Correct Incorrect Correct answer

NaHCO3
Correct Incorrect Correct answer

CaSO4
Correct Incorrect Correct answer

NaCl
Correct Incorrect Correct answer

Correct

Incorrect
Question 3 of 105

3. Question

Which of the following metals is commonly alloyed with copper to make brass?

Iron
Correct Incorrect Correct answer

Nickel
Correct Incorrect Correct answer

Aluminum
Correct Incorrect Correct answer

Zinc
Correct Incorrect Correct answer

Correct

Incorrect
Question 4 of 105

4. Question

What volume of (dm3 3 ) of water will be added to 10dm3 3 of 2.0 mol/dm3 3 HCL acid
solution to give a final solution of 0.5 mol/dm3 3 ?

30
Correct Incorrect Correct answer

40
Correct Incorrect Correct answer

20
Correct Incorrect Correct answer

50
Correct Incorrect Correct answer

Correct

Incorrect
Question 5 of 105

5. Question

What is the trend for ionization energy across a period in the periodic table?

Increases from left to right
Correct Incorrect Correct answer

Remains constant
Correct Incorrect Correct answer

Move
Correct Incorrect Correct answer

Decreases from left to right
Correct Incorrect Correct answer

Correct

Incorrect
Question 6 of 105

6. Question

H+ + + OH− − → H2 2 O
The equation above illustrates

precipitation
Correct Incorrect Correct answer

hydration
Correct Incorrect Correct answer

hydrolysis
Correct Incorrect Correct answer

neutralization
Correct Incorrect Correct answer

Correct

Incorrect
Question 7 of 105

7. Question

Which of the following methods can be used to remove temporary hardness from
water?

Boiling
Correct Incorrect Correct answer

Filtration
Correct Incorrect Correct answer

Distillation
Correct Incorrect Correct answer

Chlorination
Correct Incorrect Correct answer

Correct

Incorrect
Question 8 of 105

8. Question

Which of the following will precipitate in dil. HCl

ZnS
Correct Incorrect Correct answer

Na2 S
Correct Incorrect Correct answer

Fe S
Correct Incorrect Correct answer

CuS
Correct Incorrect Correct answer

Correct

Incorrect
Question 9 of 105

9. Question

Which of the following mixtures is an example of a colloid?

MIlk
Correct Incorrect Correct answer

Orange juice
Correct Incorrect Correct answer

Salt water
Correct Incorrect Correct answer

Sugar dissolved in water
Correct Incorrect Correct answer

Correct

Incorrect
Question 10 of 105

10. Question

Addition of charcoal to the filter bed of sand during water treatment for township supply
is to?

prevent goiter
Correct Incorrect Correct answer

prevent tooth decay
Correct Incorrect Correct answer

Remove odour
Correct Incorrect Correct answer

Kill germs
Correct Incorrect Correct answer

Correct

Incorrect
Question 11 of 105

11. Question

What is the IUPAC name for the compound CCl4

Tetrahydrochloride
Correct Incorrect Correct answer

Tetrachloromethane
Correct Incorrect Correct answer

Carbon tetrachloride
Correct Incorrect Correct answer

Chloroform
Correct Incorrect Correct answer

Correct

Incorrect
Question 12 of 105

12. Question

Addition of sodium chloride to water to form a solution would lead to?

increase in freezing point and increase the boiling point
Correct Incorrect Correct answer

increase in freezing point and decrease the boiling point
Correct Incorrect Correct answer

decrease in freezing point and decrease the boiling point
Correct Incorrect Correct answer

decrease in freezing point and increase the boiling point
Correct Incorrect Correct answer

Correct

Incorrect
Question 13 of 105

13. Question

What is the chemical structure of soap and detergent molecules?

Hydrophilic head and hydrophobic tail
Correct Incorrect Correct answer

Hydrophilic head and hydrophilic tail
Correct Incorrect Correct answer

Hydrophobic head and hydrophobic tail
Correct Incorrect Correct answer

Hydrophilic tail and hydrophobic head
Correct Incorrect Correct answer

Correct

Incorrect
Question 14 of 105

14. Question

The function of sulphur during the vulcanization of rubber is to

act as a catalyst for the polymerization of rubber molecules
Correct Incorrect Correct answer

convert rubber from thermosetting to thermoplastic polymer
Correct Incorrect Correct answer

form chains which bind rubber molecules together
Correct Incorrect Correct answer

break down rubber polymer molecules
Correct Incorrect Correct answer

Correct

Incorrect
Question 15 of 105

15. Question

The dehydration of CH3 3 CH2 2 CH2 2 CH2 2 OH will give?

HC≡CCH2 2 CH3
Correct Incorrect Correct answer

CH2 2 ≡CH2 2 CH3
Correct Incorrect Correct answer

CH3 3 C≡CCH3
Correct Incorrect Correct answer

CH3 3 CH=CHCH3
Correct Incorrect Correct answer

Correct

Incorrect
Question 16 of 105

16. Question

What is the sum of the oxidation numbers in a neutral compound?

+2
Correct Incorrect Correct answer

-1
Correct Incorrect Correct answer

0
Correct Incorrect Correct answer

+1
Correct Incorrect Correct answer

Correct

Incorrect
Question 17 of 105

17. Question

Alkanes are used mainly?

in the textile industry
Correct Incorrect Correct answer

in the hydrogenation of oils
Correct Incorrect Correct answer

as domestic and industrial fuels
Correct Incorrect Correct answer

as fine chemicals
Correct Incorrect Correct answer

Correct

Incorrect
Question 18 of 105

18. Question

What happens to the value of the equilibrium constant (Kc) for a reaction if the reaction
is reversed?

t becomes zero
Correct Incorrect Correct answer

It becomes negative
Correct Incorrect Correct answer

It remains the same
Correct Incorrect Correct answer

It becomes the reciprocal of the original value
Correct Incorrect Correct answer

Correct

Incorrect
Question 19 of 105

19. Question

N2 2 O4 4 ? 2NO2 2 (? = -ve)
From the reaction above, which of these conditions would produce the highest
equilibrium yield for N2 2 O4 4 ?

Low temperature and high pressure
Correct Incorrect Correct answer

Low temperature and low pressure
Correct Incorrect Correct answer

high temperature and low pressure
Correct Incorrect Correct answer

high temperature and high pressure
Correct Incorrect Correct answer

Correct

Incorrect
Question 20 of 105

20. Question

Stainless steel is an alloy made up of

Iron and zinc
Correct Incorrect Correct answer

Copper and tin
Correct Incorrect Correct answer

Iron and chromium
Correct Incorrect Correct answer

Iron and carbon
Correct Incorrect Correct answer

Correct

Incorrect
Question 21 of 105

21. Question

In which of the following will hydrogen form ionic compound?

HCL
Correct Incorrect Correct answer

NaH
Correct Incorrect Correct answer

NH3
Correct Incorrect Correct answer

CH4
Correct Incorrect Correct answer

Correct

Incorrect
Question 22 of 105

22. Question

What happens to the position of equilibrium if a reversible reaction is subjected to a
decrease in temperature?

The position of equilibrium shifts to the left
Correct Incorrect Correct answer

The position of equilibrium shifts to the right.
Correct Incorrect Correct answer

The position of equilibrium remains unchanged
Correct Incorrect Correct answer

The reaction stops
Correct Incorrect Correct answer

Correct

Incorrect
Question 23 of 105

23. Question

Which of the following is used as a moderator to control nuclear fission?

Lead
Correct Incorrect Correct answer

Heavy water
Correct Incorrect Correct answer

Iron
Correct Incorrect Correct answer

Chromium
Correct Incorrect Correct answer

Correct

Incorrect
Question 24 of 105

24. Question

Which functional group is present in alkanals?

Carbonyl group (C=O)
Correct Incorrect Correct answer

Hydroxyl group (-OH)
Correct Incorrect Correct answer

Alkyl group (-R)
Correct Incorrect Correct answer

Carboxyl group (-COOH)
Correct Incorrect Correct answer

Correct

Incorrect
Question 25 of 105

25. Question

Which of the following statement is TRUE of the complete hydrolysis of a
glyceride by sodium hydroxide?

3 moles of NaOH are required for each mole of glyceride
Correct Incorrect Correct answer

3 moles of glycerol are produced
Correct Incorrect Correct answer

only one mole of soap is formed
Correct Incorrect Correct answer

concentrated H2SO4 is essential for the completion of the reaction.
Correct Incorrect Correct answer

Correct

Incorrect
Question 26 of 105

26. Question

What is the maximum number of electrons that can occupy the second energy level
(n=2)?

2 electrons
Correct Incorrect Correct answer

18 electrons
Correct Incorrect Correct answer

8 electrons
Correct Incorrect Correct answer

32 electrons
Correct Incorrect Correct answer

Correct

Incorrect
Question 27 of 105

27. Question

Which of the following does NOT contain aluminum as a component?

Over-head cables
Correct Incorrect Correct answer

Duralumin
Correct Incorrect Correct answer

Container for caustic soda
Correct Incorrect Correct answer

Container for trioxonitrate (v) acid
Correct Incorrect Correct answer

Correct

Incorrect
Question 28 of 105

28. Question

What is the main environmental concern associated with sulfur dioxide emissions?

Formation of acid rain
Correct Incorrect Correct answer

Global warming potential
Correct Incorrect Correct answer

Depletion of the stratospheric ozone
Correct Incorrect Correct answer

Depletion of the ozone layer
Correct Incorrect Correct answer

Correct

Incorrect
Question 29 of 105

29. Question

Chlorine is a common bleaching agent. This is not true with

wet litmus paper
Correct Incorrect Correct answer

printers ink
Correct Incorrect Correct answer

wet pawpaw leaf
Correct Incorrect Correct answer

most wet fabric dyes
Correct Incorrect Correct answer

Correct

Incorrect
Question 30 of 105

30. Question

A gas occupies a volume of 1.5 liters at a pressure of 2 atmospheres. If the pressure is
increased to 4 atmospheres while the temperature remains constant, what will be the
new volume of the gas?

6 liters
Correct Incorrect Correct answer

1.5 liters
Correct Incorrect Correct answer

0.75 Litres
Correct Incorrect Correct answer

3 litres
Correct Incorrect Correct answer

Correct

Incorrect
Question 31 of 105

31. Question

Which organic compound is responsible for the characteristic aroma of fruits?

Alkane
Correct Incorrect Correct answer

Alkyne
Correct Incorrect Correct answer

Ester
Correct Incorrect Correct answer

Amine
Correct Incorrect Correct answer

Correct

Incorrect
Question 32 of 105

32. Question

The following non-metal form acidic oxides with oxygen except?

phosphorus
Correct Incorrect Correct answer

Sulphur
Correct Incorrect Correct answer

Carbon
Correct Incorrect Correct answer

Chlorine
Correct Incorrect Correct answer

Correct

Incorrect
Question 33 of 105

33. Question

Which of the following is a unique property of water compared to other liquids?

It is a poor solvent
Correct Incorrect Correct answer

It does not evaporate
Correct Incorrect Correct answer

It expands when freezing
Correct Incorrect Correct answer

It has a low heat capacity
Correct Incorrect Correct answer

Correct

Incorrect
Question 34 of 105

34. Question

Zn + 2HCL → ZnCl2 2 + H2 2
What happens to zinc in the above reaction?

oxidized
Correct Incorrect Correct answer

a reactant
Correct Incorrect Correct answer

reduced
Correct Incorrect Correct answer

a metal
Correct Incorrect Correct answer

Correct

Incorrect
Question 35 of 105

35. Question

The contact process is used for the industrial production of

sulfuric acid (H2SO4)
Correct Incorrect Correct answer

Hydrochloric acid (HCl)
Correct Incorrect Correct answer

Sodium hydroxide (NaOH)
Correct Incorrect Correct answer

Calcium oxide (CaO)
Correct Incorrect Correct answer

Correct

Incorrect
Question 36 of 105

36. Question

In the extraction of iron, hot air is introduced into the blast furnace through?

Valves
Correct Incorrect Correct answer

Open-hearths
Correct Incorrect Correct answer

Arcs
Correct Incorrect Correct answer

Tuyeres
Correct Incorrect Correct answer

Correct

Incorrect
Question 37 of 105

37. Question

Identify the reducing agent in the following reaction:
Zn + CuSO4 4 → ZnSO4 4 + Cu

Cu
Correct Incorrect Correct answer

ZnZnSO4
Correct Incorrect Correct answer

CuSO4
Correct Incorrect Correct answer

CuSO4
Correct Incorrect Correct answer

Correct

Incorrect
Question 38 of 105

38. Question

Crude petroleum is converted to useful products by the process of?

fractional crystallization
Correct Incorrect Correct answer

fractional distillation
Correct Incorrect Correct answer

filtration
Correct Incorrect Correct answer

chromatography
Correct Incorrect Correct answer

Correct

Incorrect
Question 39 of 105

39. Question

The heat of reaction can be determined experimentally using a device called a

Calorimeter
Correct Incorrect Correct answer

Barometer
Correct Incorrect Correct answer

Spectrometer
Correct Incorrect Correct answer

Thermometer
Correct Incorrect Correct answer

Correct

Incorrect
Question 40 of 105

40. Question

6g of Mg was to 100cm3 of 1 moldm3 H2 SO4 . What mass of Mg remained
undissolved? (Mg = 24)

0.24g
Correct Incorrect Correct answer

2.4g
Correct Incorrect Correct answer

3.6g
Correct Incorrect Correct answer

0.36g
Correct Incorrect Correct answer

Correct

Incorrect
Question 41 of 105

41. Question

What is eutrophication?

The release of harmful chemicals into water bodies
Correct Incorrect Correct answer

The excessive growth of algae due to nutrient enrichment
Correct Incorrect Correct answer

The presence of heavy metals in water
Correct Incorrect Correct answer

The formation of oil slicks on water surfaces
Correct Incorrect Correct answer

Correct

Incorrect
Question 42 of 105

42. Question

Which of the following increases as boiling water changes to steam?

Temperature of the system
Correct Incorrect Correct answer

degree of disorder of the system
Correct Incorrect Correct answer

Number of molecules
Correct Incorrect Correct answer

Activation energy
Correct Incorrect Correct answer

Correct

Incorrect
Question 43 of 105

43. Question

Which of the following statements is true regarding the melting and boiling points of
pure substances?

The boiling point is always higher than the melting point
Correct Incorrect Correct answer

The melting point is always higher than the boiling point
Correct Incorrect Correct answer

The melting and boiling points are always the same for all substances
Correct Incorrect Correct answer

The melting and boiling points can vary depending on the substance
Correct Incorrect Correct answer

Correct

Incorrect
Question 44 of 105

44. Question

SO2 2 + O2 2 → 2SO3 3

chromium(vi)oxide
Correct Incorrect Correct answer

iron(iii)oxide
Correct Incorrect Correct answer

copper(i)oxide
Correct Incorrect Correct answer

vanadium(v)oxide
Correct Incorrect Correct answer

Correct

Incorrect
Question 45 of 105

45. Question

Which type of salt is found in antacid medications and is used to relieve heartburn and
indigestion?

Aluminum chloride
Correct Incorrect Correct answer

Magnesium chloride
Correct Incorrect Correct answer

Sodium chloride
Correct Incorrect Correct answer

Calcium chloride
Correct Incorrect Correct answer

Correct

Incorrect
Question 46 of 105

46. Question

Hard water is water with high concentrations of dissolved ions, in particular calcium and

magnesium ions
Correct Incorrect Correct answer

Nitrogen ions
Correct Incorrect Correct answer

Phosphorus ions
Correct Incorrect Correct answer

Helium ions
Correct Incorrect Correct answer

Correct

Incorrect
Question 47 of 105

47. Question

An organic compound with fishy smell is likely to have a general formula?

RCONHR1
Correct Incorrect Correct answer

RCONH2
Correct Incorrect Correct answer

RNH2
Correct Incorrect Correct answer

RCOR1
Correct Incorrect Correct answer

Correct

Incorrect
Question 48 of 105

48. Question

Balance the following redox reaction:
Fe2 2 O3 3 + CO → Fe + CO2

Fe2 2 O3 3 + CO → 2Fe + 2CO2
Correct Incorrect Correct answer

2Fe2 2 O3 3 + 3CO → 4Fe + 3CO2
Correct Incorrect Correct answer

Fe2 2 O3 3 + 2CO → 2Fe + 2CO2
Correct Incorrect Correct answer

Fe2 2 O3 3 + 3CO → 2Fe + 3CO2
Correct Incorrect Correct answer

Correct

Incorrect
Question 49 of 105

49. Question

Ethene, when passed into concentrated H2SO4, is rapidly absorbed. The product
is diluted with water and then warmed to produce

Ethanol
Correct Incorrect Correct answer

diethyl ether
Correct Incorrect Correct answer

Ethanal
Correct Incorrect Correct answer

diethyl sulphate
Correct Incorrect Correct answer

Correct

Incorrect
Question 50 of 105

50. Question

What is the principal ore of iron, from which iron is extracted?

Calcite
Correct Incorrect Correct answer

Bauxite
Correct Incorrect Correct answer

Magnetite
Correct Incorrect Correct answer

Hematite
Correct Incorrect Correct answer

Correct

Incorrect
Question 51 of 105

51. Question

Which of the following is an example of a primary cell?

Alkaline battery
Correct Incorrect Correct answer

Fuel cell
Correct Incorrect Correct answer

Lead-acid battery
Correct Incorrect Correct answer

Lithium-ion battery
Correct Incorrect Correct answer

Correct

Incorrect
Question 52 of 105

52. Question

A piece of radioactive element has initially 8.0×10^22 atoms. The half life of two
days after 16 days the number of atom is

5×10^21
Correct Incorrect Correct answer

5×10^22
Correct Incorrect Correct answer

25×10^21
Correct Incorrect Correct answer

25×10^22
Correct Incorrect Correct answer

Correct

Incorrect
Question 53 of 105

53. Question

When anhydrous cobalt chloride paper is exposed to water, what color change is
observed

From pink to blue
Correct Incorrect Correct answer

From white to blue
Correct Incorrect Correct answer

From blue to white
Correct Incorrect Correct answer

From blue to pink
Correct Incorrect Correct answer

Correct

Incorrect
Question 54 of 105

54. Question

Mixing aqueos solution of barium hydroxide and sodium tetraoxocarbonate (iv)
yields a white precipitate of

Barium oxide
Correct Incorrect Correct answer

Sodium tetraoxocarbonate
Correct Incorrect Correct answer

Sodium hydroxide
Correct Incorrect Correct answer

Barium tetraoxocarbonate
Correct Incorrect Correct answer

Correct

Incorrect
Question 55 of 105

55. Question

Which of the following methods is commonly used to remove suspended impurities from
water?

Floridation
Correct Incorrect Correct answer

Chlorination
Correct Incorrect Correct answer

Filtration
Correct Incorrect Correct answer

Distillation
Correct Incorrect Correct answer

Correct

Incorrect
Question 56 of 105

56. Question

Which of the following compound is NOT the correct formed compound when
the parent metal is heated in air?

Calcium oxide
Correct Incorrect Correct answer

Sodium oxide ( Na2O )
Correct Incorrect Correct answer

Copper (II) oxide (CuO)
Correct Incorrect Correct answer

tri-iron tetraoxide (Fe2O)
Correct Incorrect Correct answer

Correct

Incorrect
Question 57 of 105

57. Question

Sodium reacts vigorously with water to produce

Sodium chloride (NaCl) and oxygen gas (O2)
Correct Incorrect Correct answer

Sodium nitrate (NaNO3) and water (H2O)
Correct Incorrect Correct answer

Sodium hydroxide (NaOH) and hydrogen gas (H2)
Correct Incorrect Correct answer

Sodium oxide (Na2O) and hydrogen gas (H2)
Correct Incorrect Correct answer

Correct

Incorrect
Question 58 of 105

58. Question

An organic compound contains 69% carbon, 15.3% hydrogen and 30.7% oxygen.
Calculate the the empirical formula [C=12, H = 1, O = 16]

C4 4 H12 1 2 O
Correct Incorrect Correct answer

C3 3 H9 9 O
Correct Incorrect Correct answer

C4 4 H9 9 O
Correct Incorrect Correct answer

C3 3 H8 8 O
Correct Incorrect Correct answer

Correct

Incorrect
Question 59 of 105

59. Question

When a substance is oxidized, it

Loses electrons
Correct Incorrect Correct answer

Gains oxygen atoms
Correct Incorrect Correct answer

Gains electron
Correct Incorrect Correct answer

Loses protons (H+ ions)
Correct Incorrect Correct answer

Correct

Incorrect
Question 60 of 105

60. Question

There is a large temperature interval between the melting point and the boiling
point of metal because:

metals have a very high melting point
Correct Incorrect Correct answer

metals conduct heat very rapidly
Correct Incorrect Correct answer

melting does not break the metallic bond but boiling does
Correct Incorrect Correct answer

the crystal lattice of metal is easily broken
Correct Incorrect Correct answer

Correct

Incorrect
Question 61 of 105

61. Question

Which of the following is a common laboratory indicator for bases?

Methyl orange
Correct Incorrect Correct answer

Phenolphthalein
Correct Incorrect Correct answer

Bromothymol blue
Correct Incorrect Correct answer

Litmus
Correct Incorrect Correct answer

Correct

Incorrect
Question 62 of 105

62. Question

At room temperature and standard pressure, chlorine gas is in which state of matter?

Plasma
Correct Incorrect Correct answer

Solid
Correct Incorrect Correct answer

Liquid
Correct Incorrect Correct answer

Gas
Correct Incorrect Correct answer

Correct

Incorrect
Question 63 of 105

63. Question

The IUPAC nomenclature of the structure is

3-chloro-3-methylbutane
Correct Incorrect Correct answer

2,2,-dichloro-3-methylbutane
Correct Incorrect Correct answer

3-methylchlorobutane
Correct Incorrect Correct answer

2-chloro-2-methylbutane
Correct Incorrect Correct answer

Correct

Incorrect
Question 64 of 105

64. Question

An element has an atomic number of 8 and a mass number of 16. How many neutrons
does this element have?

24
Correct Incorrect Correct answer

16
Correct Incorrect Correct answer

8
Correct Incorrect Correct answer

33
Correct Incorrect Correct answer

Correct

Incorrect
Question 65 of 105

65. Question

A certain volume of gas at 298k is heated such that its volume and pressure are
now four times the original values. What is the new temperature?

18.6K
Correct Incorrect Correct answer

100.0K
Correct Incorrect Correct answer

298.0K
Correct Incorrect Correct answer

4768.0K
Correct Incorrect Correct answer

Correct

Incorrect
Question 66 of 105

66. Question

What is the main source of carbon monoxide (CO) in urban areas?

Volcanic eruptions
Correct Incorrect Correct answer

Vehicle emissions
Correct Incorrect Correct answer

Forest fires
Correct Incorrect Correct answer

Industrial processes
Correct Incorrect Correct answer

Correct

Incorrect
Question 67 of 105

67. Question

The IUPAC name for CICH2-CH2-CH2-OH is

1-chloropropan-3-ol
Correct Incorrect Correct answer

3-chloropropan-1-ol
Correct Incorrect Correct answer

1 cholorpropano
Correct Incorrect Correct answer

3-chloropropanol
Correct Incorrect Correct answer

Correct

Incorrect
Question 68 of 105

68. Question

Benzene can be converted to its derivative toluene by the addition of a methyl group.
The reaction is an example of

Nucleophilic substitution
Correct Incorrect Correct answer

Elimination reaction
Correct Incorrect Correct answer

Electrophilic substitution
Correct Incorrect Correct answer

Addition reaction
Correct Incorrect Correct answer

Correct

Incorrect
Question 69 of 105

69. Question

The removal of rust from iron by treatment with tetraoxosulphate (vi) acid is
based on the

Hydrolysis of the iron
Correct Incorrect Correct answer

Reaction of acid with base
Correct Incorrect Correct answer

Oxidation of the rust
Correct Incorrect Correct answer

Dehydration of the iron
Correct Incorrect Correct answer

Correct

Incorrect
Question 70 of 105

70. Question

What is the valency of an element with the electronic configuration 2, 8, 7?

7
Correct Incorrect Correct answer

1
Correct Incorrect Correct answer

2
Correct Incorrect Correct answer

3
Correct Incorrect Correct answer

Correct

Incorrect
Question 71 of 105

71. Question

How many bonding pair are present in carbon(iv)oxide?

4
Correct Incorrect Correct answer

3
Correct Incorrect Correct answer

2
Correct Incorrect Correct answer

1
Correct Incorrect Correct answer

Correct

Incorrect
Question 72 of 105

72. Question

Which of the following is a characteristic property of acids?

Turn litmus paper blue
Correct Incorrect Correct answer

Bitter taste
Correct Incorrect Correct answer

pH value above 7
Correct Incorrect Correct answer

React with metals to produce hydrogen gas
Correct Incorrect Correct answer

Correct

Incorrect
Question 73 of 105

73. Question

A sample of gas with an initial volume of 2.5 dm3 is heated and then allowed to
expand to 7.5 dm3 at constant at pressure. What is the ratio of the final
temperature of the initial absolute temperature?

3:1
Correct Incorrect Correct answer

1:3
Correct Incorrect Correct answer

2:5
Correct Incorrect Correct answer

5:2
Correct Incorrect Correct answer

Correct

Incorrect
Question 74 of 105

74. Question

Which of the following is a primary constituent of crude oil?

Pentane
Correct Incorrect Correct answer

Ethanol
Correct Incorrect Correct answer

Heptane
Correct Incorrect Correct answer

Methane
Correct Incorrect Correct answer

Correct

Incorrect
Question 75 of 105

75. Question

Copper (II) tetraoxosulphate (IV) is widely used as

Fertilizer
Correct Incorrect Correct answer

Fungicide
Correct Incorrect Correct answer

Disinfectant
Correct Incorrect Correct answer

Purifier
Correct Incorrect Correct answer

Correct

Incorrect
Question 76 of 105

76. Question

Which of the following reactions would be expected to have the highest entropy
change?

Liquid → Gas
Correct Incorrect Correct answer

Solid → Liquid
Correct Incorrect Correct answer

Gas → Liquid
Correct Incorrect Correct answer

Gas → Solid
Correct Incorrect Correct answer

Correct

Incorrect
Question 77 of 105

77. Question

On the basis of the electrochemical series, which of these ions will show the greater
tendency to be discharged at the cathode in an electrolytic cell

cu2+
Correct Incorrect Correct answer

sn2+
Correct Incorrect Correct answer

fe2+
Correct Incorrect Correct answer

zn2+
Correct Incorrect Correct answer

Correct

Incorrect
Question 78 of 105

78. Question

When an acidic solution is diluted, what happens to its pH?

It depends on the specific acid
Correct Incorrect Correct answer

It decreases
Correct Incorrect Correct answer

It remains the same
Correct Incorrect Correct answer

It increases
Correct Incorrect Correct answer

Correct

Incorrect
Question 79 of 105

79. Question

The boiling point of water, ethanol, toulene and butan-2-ol are 373.0k, 351.3k,
383.6k and 372.5k respectively, which liquid has the highest vapour pressure at
323.0k

Water
Correct Incorrect Correct answer

toluene
Correct Incorrect Correct answer

Ethanol
Correct Incorrect Correct answer

butan-2-ol
Correct Incorrect Correct answer

Correct

Incorrect
Question 80 of 105

80. Question

In the conductance of aqueous \( \mathrm{CuSO}_{4} \) solution, the current carriers are the

mobile electrons
Correct Incorrect Correct answer

metallic ions
Correct Incorrect Correct answer

hydrated ions
Correct Incorrect Correct answer

hydrated electrons
Correct Incorrect Correct answer

Correct

Incorrect
Question 81 of 105

81. Question

What is formed when metal reacts with acid to liberate gas?

Salt
Correct Incorrect Correct answer

Base
Correct Incorrect Correct answer

Acid
Correct Incorrect Correct answer

Liquid
Correct Incorrect Correct answer

Correct

Incorrect
Question 82 of 105

82. Question

When a few drops of Millon reagents is added to egg-white solution in a test tube, the white precipitate changes to

orange
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brick red
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reddish brown
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blue
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Question 83 of 105

83. Question

The compound of Copper used as a fungicide is

\( \mathrm{CuCO}_{3} \)
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\( \mathrm{Cu(NO_{3})}_{2} \)
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\( \mathrm{CuSO}_{4} \)
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\( \mathrm{CuCl}_{2} \)
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Question 84 of 105

84. Question

An oxide of nitrogen that can rekindle a glowing splint is

nitrogen(I)oxide
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nitrogen(II)oxide
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nitrogen(IV)oxide
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dinitrogen tetraoxide
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Question 85 of 105

85. Question

The combustion of candle under limited supply of air forms

water and \( \text{CO}_{2} \)
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water and \( \text{CO} \)
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soot and \( \text{CO} \)
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soot and \( \text{CO}_{2} \)
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Question 86 of 105

86. Question

What would be the order of the electrolytic cell in an industry intending the production of silver plated spoons?

Cathode is the spoon; anode is a silver rod; electrolyte is a soluble silver salt
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Cathode is a silver rod; anode is the spoon; electrolyte is a soluble silver salt
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Cathode is the spoon; anode is any rod; electrolyte is a soluble silver salt
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Cathode is any rod; anode is the spoon; electrolyte is a soluble salt
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Question 87 of 105

87. Question

A liquid hydrocarbon obtained from fractional distillation of coal tar that is used in the pharmaceutical industry is

xylene
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benzene
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hexane
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Toluene
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Question 88 of 105

88. Question

The chemical formula for potassiumhexacyanoferrate(II) is

\( [\text{Fe(CN)}_{6}]^{4-} \)
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\( \text{K}_{3}\text{Fe(CN)}_{6} \)
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\( \text{Fe(CN)}_{6} \)
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\( \text{K}_{4}\text{Fe(CN)}_{6} \)
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Question 89 of 105

89. Question

One of the following is not a water pollutant?

Inorganic fertilizers
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Warm water affluent
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Oxygen gas
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Biodegradable waste
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Question 90 of 105

90. Question

What method is suitable for the separation of gases present in air?

Catalytic cracking of liquid air
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Fractional distillation of liquid air
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Thermal decomposition of air
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Catalytic decomposition of air
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Question 91 of 105

91. Question

Heat of solution involves two steps that is accompanied by heat change. The energies involved in this steps are

lattice energy and hydration energy
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lattice energy and ionic energy
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Heat energy and lattice energy
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hydration energy and heat energy
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Question 92 of 105

92. Question

When Sulphur(IV)oxide is passed into solution of acidified tetraoxomanganate(VII), the colour changes from

blue to green
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pink to yellow
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purple to colourless
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Orange to green
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Question 93 of 105

93. Question

The main constituent of water-glass is

calcium trioxosilicate(IV)
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calcium trioxosulphate(IV)
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sodium trioxosulphate(IV)
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sodium trioxosilicate(IV)
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Question 94 of 105

94. Question

How many isomers has the organic compound represented by the formula
\( \text{C}_{3}\text{H}_{8}\text{O} \)?

2
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3
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4
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5
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Question 95 of 105

95. Question

Determine the half-life of a first order reaction with constant
\( 4.5 \times 10^{-3} \,\text{s}^{-1} \).

154s
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15.4s
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1540s
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1.54s
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Question 96 of 105

96. Question

Hydrochloric acid is regarded as a strong acid because it

ionizes partially
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ionizes completely
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is a mineral acid
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reacts with a base
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Question 97 of 105

97. Question

The constituents of Alnico are Aluminium, Nickel and

Mg
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Co
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Mn
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Cu
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Question 98 of 105

98. Question

Hydrochloric acid is not suitable in the preparation of ethanoic acid because it

is too acidic
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is too volatile
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can attack cork and rubber used as containers
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turns blue litmus red
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Question 99 of 105

99. Question

The IUPAC nomenclature of the complex \( \text{K}_{4}\text{Fe(CN)}_{6} \) is

potassium hexacyanoferrate(II)
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potassium hexacyanoferrate(III)
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potassium hexacyanoferrate(IV)
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potassium hexacyanoferrate(VI)
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Question 100 of 105

100. Question

The shape of the molecule of Carbon(IV) oxide is

tetrahedral
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pyramidal
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plannar
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linear
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Question 101 of 105

101. Question

In a chemical reaction, surface area of reactants can affect

\( \text{CaCO}_{3} + 2\text{HCl} \;\rightarrow\; \text{CaCl}_{2} + \text{H}_{2}\text{O} + \text{CO}_{2} \)
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\( \text{MgCl}_{2} + \text{H}_{2}\text{SO}_{4} \;\rightarrow\; \text{MgSO}_{4} + 2\text{HCl} \)
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\( \text{H}_{2} + \text{Cl}_{2} \;\rightarrow\; 2\text{HCl} \)
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\( \text{NaOH} + \text{HCl} \;\rightarrow\; \text{NaCl} + \text{H}_{2}\text{O} \)
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Question 102 of 105

102. Question

An example of a physical change is

slaking of lime
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liquefaction of liquids
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dissolution of limestone in acid
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rusting of iron
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Question 103 of 105

103. Question

The term that is not associated with petroleum industry is ?

Cracking
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Saponification
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Polymerization
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Fermentation
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Question 104 of 105

104. Question

An example of a compound that is acidic in solution is

\( \text{H}_{3}\text{PO}_{4} \)
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\( \text{NH}_{4}\text{Cl} \)
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\( \text{Na}_{2}\text{CO}_{3} \)
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\( \text{MgCl}_{2} \)
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Incorrect
Question 105 of 105

105. Question

The percentage of carbon(IV) oxide in air is

0.01
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0.02
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0.05
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0.03
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Correct

Incorrect

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