Q.)One litre of water is evaporated from 6 litres of a solution containing 5% salt. The percetange of salt in the remaining solution is

1) %

2) %

3) 5%

4) 6%

Solution :

Salt present in 6 litres = = 0.3 litre

Water present in 6 litres = 6 – 0.3 = 5.7 litres

1 litre of water evaporated. Hence , remaining water = 5.7 – 1 = 4.7 litres

Percentage of Salt in the remaining Solution = %

Henc , Option(4)