J Chemistry 19

The IUPAC name for CH₃CH₂COOCH₂CH₃ is

Which of the following sets of operation will completely separate a mixture of
sodium chloride, sand and iodine?

The velocity, V of a gas is related to its mass, M by (k = proportionality constant)

The part of the total energy of a system that accounts for the useful work done in
a system is known as

In the reaction:
M + N → P
ΔH = +Q kJ
Which of the following would increase the concentration of the product?

If the cost of electricity required to discharge 10g of an ion X³⁺ is N20.00, how much would it cost to discharge 6g of ion Y²⁺?
[1 faraday = 96,500C, atomic masses are X = 27, Y = 24]

When chlorine water is exposed to bright sunlight, the following products are
formed

A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm³ of CO₂ and 54g of water. The hydrocarbon should be

The heat of formation of ethene, C₂H₄ is 50 kJmol^-1, and that of ethane, C₂H₆ is -82kJmol^-1. Calculate the heat evolved in the process:C₂H₄ + H₂ \(\rightarrow\) C₂H₆

Which process(es) is/are involved in the turning of starch iodide paper blue-black
by chlorine gas?

Methane is prepared in the laboratory by heating a mixture of sodium ethanoate
with soda lime. The chemical constituent(s) of soda lime is/are

Which two gases can be used for the demonstration of the fountain experiment

Which of the following pairs cannot be represented with a chemical formula?

The electronic configuration of element Z is
1s² 2s² 2p⁶ 3s² 3p¹.
What is the formula of the compound formed between Z and tetraoxosulphate (VI) ion?

Na₂CO₃ + 2HCl \(\rightarrow\) 2NaCl + H₂O + CO₂
The indicator most suitable for this reaction should have a pH equal to

CH₃ - CH₂ - C≡CH
The hybridization in the compound above is

A solution X on mixing with AgNO₃ solution, gives a white precipitate soluble in NH₃. A solution Y, when added to X, also gives a white precipitate which is soluble on boiling. Solution Y contains?

An element Z contains 80% of ¹⁶₈Z and 20% of ¹⁸₈Z.
Its relative atomic mass is

Which of the following statements does not show Rutherford's account of Nuclear
Theory? An atom contains a region

Which of the following pollutants will lead to the depletion of ozone layer?

2-methylprop-1-ene is an isomer of

Which of the following could not be alkane?

A synthetic rubber is obtained from the polymerization of

Which of the following is a physical change?

Which quantum divides shells into orbitals?

The following are isoelectronic ions except

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180. Find the molecular formula.
[H = 1, C = 12, O = 16]

Which important nitrogen-containing compound is produced in Haber's process?

Elements in the periodic table are arranged in the order of their

Which of the following conditions will most enhance the spontaneity of a reaction?

Elements X and Y have electronic configurations 1s² 2s² 2p⁴ and 1s² 2s² 2p⁶ 3s² 3p¹ respectively. When they combine, the formula of the compound formed is?

Hydrocarbons which will react with Tollen's reagent conform to the general
formula

What volume of 0.100M sodium trioxonitrate (V) solution contains 5g of solute.
[Na = 23, N = 14, O = 16]

SO₃ is not directly dissolved in water in the industrial preparation of H₂SO₄ by the contact process because

Hydrogen diffused through a porous plug

A cell shorthand notation can be written as
A / A⁺ // B²⁺ / B.
The double slash in the notation represents the

Consider the reaction: A + 2B(g)⇌ 2C + D(g) (ΔH = +ve)
What will be the effect of decrease in temperature on the reaction?

Which of the following alkaline metals react more quickly spontaneously with
water?

The oxidation state(s) of nitrogen in ammonium nitrite is/are

How many electrons will be found in the nucleus of an atom with mass number
23 and 17 neutrons?