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

Assertion (A): In the electrolysis of acidified water, the volume of hydrogen liberated is twice the volume of oxygen formed. Reason (R): Water has hydrogen and oxygen in the ratio of 1:2 by volume. (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).

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

In the electrolysis of molten aluminium oxide for extraction of aluminium, the following reactions take place: 1. 2. 3. 4. The reaction that takes place at the negative electrode is: (a) 1 (b) 2 (c) 3 (d) 4

What volume of carbon dioxide is produced at STP when 5 litres of propane is burnt completely according to the equation given below? (a) 10 litres (b) 15 litres (c) 20 litres (d) 25 litres

Rita added dilute hydrochloric acid to four metals. She recorded her observations in the table given below. While noting her observations she made some errors. Metals Observations 1 copper a gas was given off 2 iron a gas was given off 3 magnesium no gas was given off 4 zinc a gas was given off Which observation(s) made by Rita is/are correct? (a) 1 only (b) 3 only (c) Both 1 and 4 (d) Both 2 and 4

A hydrocarbon X undergoes the reaction under suitable conditions as shown below: Which compound(s) is/are unsaturated? (a) X only (b) Y only (c) X and Z (d) Y and Z

Salts can be prepared by the action of dilute acid on: 1. bases 2. carbonates 3. metals 4. sulphites The method which cannot be used for the preparation of copper salts is: (a) 1 (b) 2 (c) 3 (d) 4

Identify the equation that shows the reaction of ethane with chlorine in the presence of ultraviolet light. (a) C2H6 + Cl2 ⟶ C2H6Cl2 (b) C2H6 + Cl2 ⟶ C2H4Cl2 + H2 (c) C2H6 + Cl2 ⟶ C2H5Cl + HCl (d) C2H6 + Cl2 ⟶ 2CH3Cl

With respect to the electrolysis of copper (II) sulphate solution using copper electrodes, which statement is correct? (a) Copper metal is deposited at the negative electrode. (b) Oxygen gas is produced at the positive electrode. (c) The positive electrode increases in mass. (d) The negative electrode decreases in mass.

An unsaturated hydrocarbon with three atoms of carbon and six atoms of hydrogen is: (a) propyne (b) propane (c) propene (d) propanol