Three solutions contain carbonate, sulphate and sulphide ions respectively. One test that will identify just ONE of them completely is by addition to each of them of
A. barium chloride solution
B. dilute hydrochloric acide
C. lead nitrate solution
D. calcium chloride solution
E. sodium hydroxide solution

If excess zinc is added to a bluish green solution of copper (II) sulphate, and the excess zinc filtered off after completion of reaction, a colourless solution is obtained because
A. both zinc and copper are metals
B. the sulphate radical and the zinc ion are divalent
C. zinc is more electropositive than copper
D. both zinc and copper form depositive ions in solution
E. zinc is a reducing agent

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