Question

(a) Give an example for a combination reaction which is exothermic.
(b) Identify the oxidising agent, reducing agent in the following reaction :
H2S+Cl2 >2HCl+S

(c) Name the phenomenon due to which the taste and smell of oily food changes when kept for a long time in open. Suggest one method to prevent it.
CBSE Class X Science SA 2 (3 Marks)

Answer 1

a) C + O2 -----> CO2

b) oxidising agent- Cl2

Reducing agent- H2S

C) Rancidity

Method to prevent-

Keep food in airtight containers.

Keep food in refrigerator.

Hope it helps.

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