Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions

2.5 litres of NaCl solution contain 5 moles of the solute. What is the molarity?

The mole fraction of the solute in one molal aqueous solution is ____________.

5 ml of N HCl, 20 ml of N/2 H₂SO₄ and 30 ml of N/3 HNO₃ are mixed together and volume made to one litre. The normality of the resulting solution is:

25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35 ml. The molarity of barium hydroxide solution was ______.

Mole fraction of the solute in a 1.00 molal aqueous solution is ____________.

What is the normality of a 1 M solution of H₃PO₄?

The volume of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCl are ____________.

Molarity of H₂SO₄ is 18 M. Its density is 1.8 g/ml. Hence molality is:

200 ml of water is added to 500 ml of 0.2 M solution. What is the molarity of this diluted solution?

How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0M HNO₃? The concentrated acid is 70% HNO₃:

For preparing 0.1 N solution of a compound from its impure sample of which the percentage purity is known, the weight of the substance required will be:

If N/10 50 ml H₂SO₄, N/3 30 ml HNO₃, N/2 10 ml HCl is mixed and solution is made to 1 L. Then normality of the resultant solution is:

A solution made by dissolving 40 g NaOH in 1000 g of water is ____________.

Which of the following concentration terms is/are independent of temperature?

A solution is prepared by dissolving 10 g NaOH in 1250 mL of a solvent of density 0.8 mL/g. The molality of the solution in mol kg^–1 is:

Which of the following units is useful in relating concentration of solution with its vapour pressure?

Which of the following concentration unit is independent of temperature?

On heating ammonium dichromate and barium azide separately we get ______.

In Haber’s process for the manufacture of NH₃:

Ammonia on reaction with hypochlorite anion can form: