Question

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

• A. 4%
• B. 5%
• C. 6%
• D. None of these

Answer 1

The correct option is C 6%

Salt in 6 litres = 5% of 6 litre = $(\frac{5}{100}\times 6)=0.30litre$

Salt in new solution = $(\frac{0.30}{5}\times 100)=6$%

Hence, option C is correct.