Q.

Correct decreasing order of equivalent conductivity in aqueous solution at same temperature is 

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a

NaCl > HCl > CH3COOH

b

HCl > NaCl > CH3COOH

c

NaCl > CH3COOH > HCl

d

HCl =  NaCl > CH3COOH

answer is A.

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Detailed Solution

Acetic acid is weak acid and is feebly ionised, equivalent conductivity is small. Both HCl and NaCl are strong electrolytes and completely ionised.  

H+ is smaller in size than Na+ ,ionic mobility and ionic conductivity is greater than Na+ 

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