English Medium Class 9 - CBSE Question Bank Solutions for Science

Which of the two will scatter light : soap solution or sugar solution ? Why ?

State whether colloidal solutions are homogeneous or heterogeneous.

State whether colloidal solutions are homogeneous or heterogeneous.

What is the most common way of expressing the concentration of a solution ?

What is the most common way of expressing the concentration of a solution ?

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

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 ?

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

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A 5 per cent sugar solution means that :

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A 5 per cent sugar solution means that :

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A 15% alcohol solution means :

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A 15% alcohol solution means :

Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.

Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.

What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?

What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?

A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.

A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.

If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.