Multiple choice

If 4 liters of water is evaporated on boiling from 12 liters of salt solution containing 7\% salt, the percentage of salt in the remaining solution is

  1. 10.5

  2. 11.5

  3. 12

  4. 13
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A Correct answer
Explanation

Initial salt amount = 7% of 12L = 0.84L. After evaporating 4L water, remaining solution is 8L with the same 0.84L salt. New percentage = (0.84/8) × 100 = 10.5%.

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