J Chemistry 22

One of the active components of baking powder is

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

H⁺ + OH^- → H₂O

The equation above illustrates

Which of the following will precipitate in dil. HCl

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

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

The function of sulphur during the vulcanization of rubber is to

The dehydration of CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)OH will give?

Alkanes are used mainly?

N₂O₄ ⇌ 2NO₂    (Δ = -ve)

From the reaction above, which of these conditions would produce the highest equilibrium yield for N₂O₄?

In which of the following will hydrogen form ionic compound?

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

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

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

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

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

Zn + 2HCl → ZnCl₂ + H₂

What happens to zinc in the above reaction?

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

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

6 g of Mg was added to 100 cm\(^{3}\) of 1 mol/dm\(^{3}\) H\(_2\)SO\(_4\). What mass of Mg remained undissolved? (Mg = 24)

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

2SO₂(g) + O₂(g) ↔ 2SO₃(g).

In the chemical reaction above, the substance that will increase the rate of production of sulphur (VI) oxide is

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

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

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

A metal which can be used as sacrificial anode for preventing corrosion of length of iron pipe is

A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?

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

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

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

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

The IUPAC nomenclature of the structure is

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?

The IUPAC name for the compound ClCH₂CH₂OH is

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

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

A gas sample with an initial volume of 3.25 dm³ is heated and allowed to expand to 9.75 dm³ at constant pressure.
What is the ratio of the final absolute temperature to the initial absolute temperature?

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

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

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