Ethane burns in oxygen to form CO₂ and H₂O according to the equation:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

If 1250 cc of oxygen is burnt with 300 cc of ethane.

Calculate:
(i) the volume of CO₂ formed

(ii) the volume of unused O₂

Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:

(i) Weak acid?

(ii) Strong alkali?

Give a chemical test to distinguish between the following pairs of chemicals:

Lead nitrate solution and zinc nitrate solution

Give a chemical test to distinguish between the following pairs of chemicals:

Sodium chloride solution and sodium nitrate solution

write a balanced equation for the preparation of the following salts:

Copper sulphate from copper carbonate.

Write a balanced equation for the preparation of the following salts:

Zinc carbonate from zinc sulphate

67.

What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of Nitric acid?

State why for the preparation of Nitric acid, the complete apparatus is made up of glass.

Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with:
(i) Ethanol?
(ii) Carbon?