Q63 of 400 Page 134

Define non-metals. Give five examples of non-metals.

The elements which do not allow the conduction of heat and electricity and are neither malleable nor ductile are known as non-metals. Example: Carbon, sulphur, phosphorus, silicon and oxygen.

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62 What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example. 62 Write the equations for the reactions of:

(i) Magnesium with dilute hydrochloric acid


(ii) Aluminium with dilute hydrochloric acid


(iii) Zinc with dilute hydrochloric acid


(iv) Iron with dilute hydrochloric acid

 63 Name a non-metal which conducts electricity. 63 Name a non-metal having luster (shining surface).