How much water should be added to 40 ml of 4N-HCl so that the normality of the obtained solution becomes N/10 normality? ,

How much water is to be added to dilute 10 mL of 10 N HCl to make it decinormal?

How much water should be added to 2M HCl solution to form 1"litre" of 0.5M HCl ? .

how much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?

How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?

In 729 ml mixture the ratio of milk and water is 7.2. How much quantity of water should be added in new mixture so that the ratio of milk and water becomes 7:3?