A mixture of calcium chloride and calcium trioxocarbonate (IV) in water can be separated by

• A. evaporation
• B. sublimation
• C. distillation
• D. filtration

Which of the following types of bonding does not involve the formation of new substances?

• A. Metallic
• B. Covalent
• C. Co-ordinate
• D. Electrovalent

Calculate the mass of copper deposited if a current of 0.45A flows through CuSO₄ solution for 1hour 15mins. [Cu=64.0, S= 32.0, O =16.0, 1F= 96500C]

• A. 6.40g
• B. 0.67g
• C. 0.64g
• D. 0.45g

Which of the following types of bonding does not produce a compound?

• A) ionic bonding
• B) covalent bonding
• C) dative bonding
• D) metallic bonding

Which of the following is likely to have the highest degree of hardness?

• A. Carbonated water
• B. Distilled water
• C. Acidified water
• D. Rain water

(a) What is meant by the term acid salt? Give one example.

(b) State the reason why an all-glass apparatus must be used for the laboratory preparation of concentrated trioxonitrate (V) acid.

Which of the following scientists discovered the neutron?

• A. Ernest Rutherford
• B. J.J Thompson
• C. James Chadwick
• D. R. A. M illikan

Which of the following methods is suitable for preparing insoluble salts?

• A. Thermal decomposition
• B. Oxidation
• C. Double decomposition
• D. Neutralization

Hydrogen is readily released when dilute hydrochloric acid reacts with

• A. Cu
• B. Na
• C. Au
• D. Ag

To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of

• A) CO^-
• B) Cl^-
• C) SO^-
• D) NO