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ICSE Class 9 Chemistry Question 30 of 39

Atomic Structure and Chemical Bonding — Question 13

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Question

Question 13

Potassium (At No. 19) and chlorine (At No. 17) form a compound. Explain the formation of the compound on the basis of:

(a) oxidation

(b) reduction

(c) oxidising agent

(d) reducing agent.

Answer

The electronic configuration of:

Potassium (19) = 2, 8, 8, 1

Chlorine (17) = 2, 8, 7

The reaction is :

2K + Cl2 ⟶ K+ + 2Cl-

(i) Oxidation : 2K ⟶ K+
    Potassium undergoes oxidation reaction as it loses an electron.

(ii) Reduction : Cl2 ⟶ 2Cl-
     Chlorine undergoes reduction reaction as it gains an electron.

(iii) Chlorine acts as an oxidising agent and gets reduced.

(iv) Potassium acts as a reducing agent and gets oxidised.