1. In the above equation, which of the following gets reduced? (i) CuSO4 (2) Zn (3) ZnSO4 (4) None of these

Question

In a redox reaction, both oxidation, as well as reduction, takes place together, oxidation involves loss of electrons while reduction involves the gain of electrons. The redox- reaction may involve a combination of atoms and molecules, displacement of metals, or non-metals.

Examples: Zn + CuSO_4 ^→ Cu + ZnSO₄

1. In the above equation, which of the following gets reduced?

(i) CuSO₄

(2) Zn

(3) ZnSO₄

(4) None of these

2. The oxidising agent generally:

(i) Losses the electrons

(ii) Gains the electron

(iii) Is in a gaseous state

(iv) Both b and c

3. Identify the oxidising agent in the above reaction

(i) Copper

(ii) Zinc

(iii) Zinc Sulphate

(iv) Copper Sulphate

4. What is the type of the chemical reaction given in the above example?

(i) Double displacement reaction

(ii) Displacement reaction

(iii) Combination reaction

(iv) Decomposition reaction

5. Which among the following is(are) double displacement reaction(s)?

(i) Pb + Cucl₂ → PbCl₂ + Cu

(ii) Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl

(iii) C + O₂ → CO₂

(iv) CH₄ + 2O₂ → CO₂ + 2H₂O

Answer 1

1. (i) CuSO₄

2. (i) Loss the electrons

3. (iv) Copper Sulphat

4. (ii) Displacement reation

5. (ii) Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl