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Solution


Q.

Several factories were pouring their wastes in rivers A and B. Water samples were collected from these two rivers. It was observed that sample collected from river A was acidic while that of river B was basic. The factories located near A and B are:
1 Soaps and detergents factories near A and alcohol distillery near B.  
2 Soaps and detergents factories near B and alcohol distillery near A.  
3 Lead storage battery manufacturing factories near A and soaps and detergents factories near B.  
4 Lead storage battery manufacturing factories near B and soaps and detergents factories near A.  

Ans.

(3)

The lead storage batteries use sulphuric acid which is acidic in nature while soaps and detergents are basic in nature.