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Question Paper from: IIT JEE Mains Shift 2 25th July 2021

Column - I	Column -II
a) Li	i) I^- is least stable
b) Na	ii) Bicarbonate is used for fire extinguisher
c) K	iii) Carbonate easily decomposed on heating
d) Cs	iv) Has vital role in biological system

a - (iv) b-(iii). c-(ii) d-(i)

a - (iii) b-(ii). c-(iv) d-(i)

a - (i) b-(iv). c-(ii) d-(iii)

a - (iv) b-(ii). c-(iii) d-(i)

Solution:

Chapter Name: Chemistry in Everyday Life

Difficulty Level: Moderate

$L i_{2} C O_{3} ⟶ Δ L i_{2} O + C O_{2}$

$N a H C O_{3}$ is used in dry fire extinguishers.

Potassium has vital role in biological systems.

Csl is least soluble due to the smaller hydration enthalpy of its two ions.

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IIT JEE Mains Shift 2 25th July 2021

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