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Solution


Q.

Which of the following statements are correct for carbon compounds

(i) Most carbon compounds are good conductors of electricity.
(ii) Most carbon compounds are poor conductors of electricity.
(iii) Force of attraction between molecules of carbon compounds is not very strong.
(iv) Force of attraction between molecules of carbon compounds is very strong.
1 (ii) and (iv)  
2 (ii) and (iii)  
3 (i) and (iv)  
4 (i) and (iii)  

Ans.

(2)

Electricity results from motion of electrons or ions. Most carbon compounds are poor conductors of electricity because they are formed by the sharing of electrons and therefore, they do not have free electrons. On dissolving them in water they do not form ions. So, they are generally poor conductors of electricity. Force of attraction between molecules of carbon compounds is not very strong because they form covalent bond by sharing their valence electron in order to attain stable electronic gas configuration.