Consider the following exothermic reaction
2SO2(g) + O2(g) ↔ 2SO3(g)
If the temperature of the reaction is reduced from 800°C to 500°C, an no other change takes place, then
A. the reaction rate increases
B. concentration of SO3 decreases
C. concentration of SO3 increases
D. SO2 gas becomes unreactive
E. O3 gas becomes unreactive

The most common type of chemical reaction which alkanes undergo is
A. substitution
B. addition
C. condensation
D. polymerisation
E. double decomposition

Which of the following compounds will form a solution if exposed to air?

A. Na2CO3.10H2O
B. NaNO3
C. CuSO4
D. CaCl2
E. Na2SO4.10H2O

The normal boiling point of a liquid is defined as?

A. the temperature at which its vapour pressure equals the atmospheric pressure
B. the temperature at which bubbles begin to form
C. the temperature at which the vapour pressure equals 1 temperature
D. the temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid
E. the temperature at which the space above the liquid is saturated

Hypochlorous acid is used as a bleach because
A. it is a strong acid
B. it yields chlorine readily in pure water
C. it is an oxidising agent
D. it is a weak acid
E. it is a reducing agent

The nucleus of an atom contains
A. protons only
B. neurons only
C. protons and electrons
D. neutrons and electrons
E. protons and neutrons

An example of an alcohol is
A. CCl4
B. CH3COOH
C. CHCl3
D. C2H6
E. CH3OH

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

A. ionic bond
B. electrovalent bond
C. covalent bond
D. co-ordinate bond
E. hydrogen bond

Which of the following is not a member of the homologous series of the paraffins (alkanes)?

A. C3H8
B. C5H12
C. C7H16
D. C15H32
E. C24H48

Which of the following reactions does not take place in the smelting of iron in a blast furnace?

A. CaCO3(s)→CaO(s)+(CO2(g)
B. C(s)+O2(g)→CO2(g)
C. 3Fe(s)+2O2(g)→FeO4(s)
D. SiO2(s)+CaO(s)→CaSiO3(s)
E. CO2(g)+C(s)→2CO(g)