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QUESTION
Q53) The amount of water that should be added to 500ml of 0.5N solution of NaOH to give a concentration of 10mg per ml is .... [ CPMT 1991]




SOLUTION

0.5 N solution contains 20g of NaOH in a litre
Thus 500 ml contain 10g of NaOH or 0.02g/litre or 20mg/ml
Thus to make 10mg per ml solution must be diluted to 1000 ml
or 500 ml water should be addedAnswer: (d)