Part A

HCN is a weak base, while NaCN is a salt.

Part A

HCl is a powerful acid, while NaOH is a strong base.

Part B

NaOH is a strong acid, while NaCN is a salt.

Part D

HCl is a strong acid, while HCN is a weak acid.

Part E

HCl is a powerful acid, while NaCl is a salt of a strong strong acid HCl or a strong base NaOH.

Part F

NaCN is a salt with a strong acid and weak base, while KCN is another salt with a weak acid.

Part A – Ans

HCN and NaCN act as buffers in the aqueous Solution.

Part B

In aqueous Solution, HCl and NaOH do not form buffers.

Part C

NaCN and NaOH will not create a buffer in an aqueous solution.

Part D

HCN and HCl don’t form a buffer when mixed with aqueous Solution.

Part E

In aqueous Solution, HCl or NaCl won’t form a buffer.

Part F

In aqueous Solution, NaCN and KCN do not form a buffer.