1.

Which can act as buffer?(a) NH4Cl + NH4OH(b) CH3COOH + CH3COONa(c) 40 mL of 0.1 M NaCN + 20 mL of 0.1 M HCl(d) All of the above

Answer»

Correct option: (d)

Explanation: 

NaCN (4 millimole) and HCl (2 millimole) on reaction give 2 millimole of HCN and 2 millimole of NaCN are left which acts as buffer.



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