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Grade: 12

                        

Degree of ionisation of 1 M HCOOH is decreased to a maximum extent in presence of: (A) 1 M HCHO (B) 1 M NaOH (C) 1 MHCOONa (D) equally in all

2 years ago

Answers : (2)

Arun
24742 Points
							
Degree of ionisation of 1 M HCOOH should be decreases,
If it reacts with a base.
Now 
HCOOH is an acid while NaOH is a base.
Hence correct option should be 'B'
2 years ago
Souvik Mukherjee
50 Points
							
Correct answer will be option C i.e. HCOONa, because being a salt it will completely dissociate and form ample amount of H+ ions which will decrease the dissociation of HCOOH via common ion effect by shifting the HCOOH dissociation equilibrium in backward direction.
2 years ago
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