Which of the following pairs constitutes a buffer :-

Question

Which of the following pairs constitutes a buffer :- (A)  HNO2 NaNO2  (B)  NaOH NaCl  (C)  HNO3 NH4NO3  (D)  HCl KCl

Tardigrade Admin · Accepted Answer

A pair constituent with HNO2 and NaNO2 because HNO2 is weak acid and NaNO2 is a salt of weak acid (HNO2) with strong base (NaOH), Hence it is an example of acidic buffer solution.

Q. Which of the following pairs constitutes a buffer :-

$H N O_{2}$ & $N a N O_{2}$

$N a O H$ & $N a Cl$

$H N O_{3}$ & $N H_{4} N O_{3}$

$H Cl$ & $K Cl$

A pair constituent with $H N O_{2}$ and $N a N O_{2}$ because $H N O_{2}$ is weak acid and $N a N O_{2}$ is a salt of weak acid $(H N O_{2})$ with strong base $(N a O H),$ Hence it is an example of acidic buffer solution.

Q. Which of the following pairs constitutes a buffer :-

HNO2​ & NaNO2​

NaOH & NaCl

HNO3​ & NH4​NO3​

HCl & KCl

A pair constituent with HNO2​ and NaNO2​ because HNO2​ is weak acid and NaNO2​ is a salt of weak acid (HNO2​) with strong base (NaOH), Hence it is an example of acidic buffer solution.

$H N O_{2}$ & $N a N O_{2}$

$N a O H$ & $N a Cl$

$H N O_{3}$ & $N H_{4} N O_{3}$

$H Cl$ & $K Cl$

A pair constituent with $H N O_{2}$ and $N a N O_{2}$ because $H N O_{2}$ is weak acid and $N a N O_{2}$ is a salt of weak acid $(H N O_{2})$ with strong base $(N a O H),$ Hence it is an example of acidic buffer solution.