Q4 of 53 Page 50

Write a displacement reaction for non-metal.

The best example of a displacement reaction for a non-metal is the reaction in which the more reactive halogen replaces the less reactive ones. The reaction is as follows:

Cl2 + 2NaBr → 2NaCl + Br2


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2

Give an example of a non-metal which is

a. hardest known substance.


b. a good conductor of heat and electricity.

 3

Non-metals do not evolve hydrogen gas when react with water, steam or dilute acids. Why?

 5

Write the product by giving balanced chemical equation

(i) When sulphur reacts with conc. nitric acid.


(ii) When phosphorus reacts with conc. sulphuric acid.


(iii) When phosphorus reacts with conc. nitric acid.

 1

A non-metal gains electrons to form anions. What do you mean by this statement?