SS2 CHEMISTRY 2ND TERM 2023/2024

The following processes are involved in the treatment of town water supply except

• chlorination
• dehydration
• coagulation
• filtration

An example of amorphous carbon is

• diamond
• limestone
• lampblack
• fullerene

Which of the following is an unsaturated compound?

• Benzene
• Cyclohexane
• Pentane
• Octane

In the reaction I₂ + H₂ ⇌ 2HI, if the equilibrium concentration of I₂, H₂ and HI are 2.4, 1.8 and 16.2 mol/dm³ respectively. Calculate the equilibrium constant.

• 62.4
• 60.8
• 58.0
• 38.5

In the fractional distillation of crude oil, the order of collection is

• diesel, kerosene and petrol
• kerosene, diesel and petrol
• kerosene, petrol and diesel
• petrol, diesel and kerosene

Given that H = x, S = 318.2JK⁻²mol ⁻² T = 90°C. Calculate the value of x in joules.

• 115506.0
• 113306.0
• 114406.0
• 112206.0

Which of the following explains vulcanization of rubber?

• Hardening the rubber through cross - linkage
• Increasing the solubility of the rubber
• Removing Sulphur from the rubber
• Softening the rubber through cross - linkage

How many faraday(s) of electricity is required to liberate 9g of aluminium? [Al = 27, 1F = 96500C]

• 0.3
• 1.0
• 2.7
• 3.0

The rate of a chemical reaction can be altered by the following factors except

• concentration of the reactants
• heat change accompanying the reaction
• physical state of the reactants
• temperature of the system

The maximum number of electrons that can be accommodated by the K – Shell is

• 2
• 4
• 8
• 18