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

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 ____________.

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:

The shape of ammonia molecule is ____________.

When ammonia is heated with cupric oxide, a molecule of ammonia will ____________.

Liquid ammonia bottles are opened after cooling them in ice for some time. It is because liquid NH₃ ____________.

Ammonia is generally manufactured for fertilizers by the reaction: