SS2 CHEMISTRY 2ND TERM REVISION

The suitable method for the separation of a mixture of miscible liquids with close temperature range is

• decantation
• fractional distillation
• filtration
• simple distillation

A bomb calorimeter is used to determine the heat of

• combustion
• formation
• neutralization
• solution

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

• chlorination
• coagulation
• dehydration
• filtration

An example of amorphous carbon is

• diamond
• dolomite
• fullerene
• lampblack

The suitable indicator for titration of strong base against weak acid is

• litmus
• methyl orange
• methyl red
• phenolphthalein

In the reaction I₂ + H₂ ⇌ 2HI, if the equilibrium 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, kerosene and diesel

An example of a co- ordinate covalent compound is

• Cl₂
• Cu²⁺
• H₂O
• H₃O⁺

When a crystal was added to its solution, it did not dissolve and the solution remained unchanged. This shows that it is

• concentrated
• diluted
• saturated
• supersaturated

How many molecules of oxygen are present in 8g of oxygen gas? [ O = 16, Avogadro’s number = 6.02 x 10²³]

• 1.51 x 10²³
• 3.01 x 10²³
• 4.82 x 10²³
• 9.63 x 10²³