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Q.

Degree of ionisation (or) dissociation of 1M HCOOH is decreased to a maximum extent in presence of

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a

Excess of water

b

1M HCHO

c

1M HCOONa

d

1 M NaCl

answer is C.

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Detailed Solution

HCOOH weak acid (weak electrolyte) dueto presence of common ion effect the dissociation of weak electrolyte decreases

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