In the laboratory preparation, HCl gas is dried by passing through: (a) Dilute nitric acid (b) Concentrated sulphuric acid (c) Dilute sulphuric acid (d) Acidified water

Match the Column A with Column B: Column A Column B (a) Sodium chloride 1. has two shared pair of electrons (b) Methane 2. has high melting and boiling points (c) Hydrogen chloride gas 3. a greenhouse gas (d) Oxidation reaction 4. has low melting and boiling points (e) Water 5. Zn − 2e− ⟶ Zn2+ 6. S + 2e− ⟶ S2−

State a relevant reason for the following: [2] (a) Hydrogen chloride gas cannot be dried over quick lime. (b) Ammonia gas is not collected over water.

X - HCl ⇋ H1+ + Cl- (in solution state) Y - PbBr2 ⇋ Pb2+ + 2Br1- (in molten state) From the above reactions X or Y, identify the reaction which exhibits: (a) electrolytic dissociation (b) ionization

Identify the gas evolved in each of the following reactions: (a) Methane undergoes complete combustion. (b) Copper carbonate is heated. (c) MnO2 reacts with concentrated HCl.

Rohit took two different salt solutions in test tubes C and D as shown in the figure below. He added dilute HCl to each of the two test tubes. The products formed in the test tubes C and D are silver chloride and lead chloride respectively. State: (a) one common observation made by Rohit in both the reactions. (b) the observations made by him on addition of excess of ammonium hydroxide to the products formed in: 1. test tube C 2. test tube D

Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride. (a) Write the balanced equation for the reaction with suitable conditions. (b) Name the method of collection of hydrogen chloride gas. (c) State the property of sulphuric acid which makes it suitable for the preparation of hydrogen chloride.

Give balanced equations for the following: (a) Action of dilute hydrochloric acid on ammonium carbonate. (b) Oxidation of sulphur with hot concentrated nitric acid. (c) Reaction of concentrated sulphuric acid with carbon.

Name the gas produced during each of the following reactions: (a) When copper is treated with hot, concentrated nitric acid. (b) When ammonia is burnt in an atmosphere of oxygen. (c) When ferrous sulphide reacts with dilute hydrochloric acid.

Assertion (A): Dilute Sulphuric acid is a stronger electrolyte than concentrated Sulphuric acid. Reason (R): Dilute Sulphuric acid has a higher concentration of mobile ions. (a) (A) is true but (R) is false. (b) (A) is false but (R) is true. (c) Both (A) and (R) are true and (R) is the correct explanation of (A). (d) Both (A) and (R) are true, but (R) is not the correct explanation of (A).

An atom of X forms an ion according to the equation X ⟶ X+2. The atomic number of the atom X is: (a) 16 (b) 10 (c) 12 (d) 14

The electronic configuration of an element is 2,8,2. The hydroxide of this element can produce ............... hydroxyl ions per molecule. (a) 3 (b) 2 (c) 1 (d) 0