Question

1. Why should a magnesium ribbon be cleaned before burning in air?

2. Write the balanced equation for the following chemical reactions.

(i) Hydrogen + Chlorine → Hydrogen chloride

(ii) Barium chloride + Aluminium sulphate → Barium sulphate +

Aluminium chloride

(iii) Sodium + Water → Sodium hydroxide + Hydrogen

3. Write a balanced chemical equation with state symbols for the

following reactions.

(i) Solutions of barium chloride and sodium sulphate in water react

to give insoluble barium sulphate and the solution of sodium

chloride.

(ii) Sodium hydroxide solution (in water) reacts with hydrochloric

acid solution (in water) to produce sodium chloride solution and

water.

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Answer 1

Answer:

Magnesium ribbon should be cleaned with sandpaper before burning in the air. ... Magnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.

first ans ......

second