In which of the following combinations is buf | vedclass

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(B) buffer solution is formed by a weak acid and its salt with a strong base,or a weak base and its salt with a strong acid.$A$. $NH_4OH$ (weak base)

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$A$ and $C$

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(B) buffer solution is formed by a weak acid and its salt with a strong base,or a weak base and its salt with a strong acid.$A$. $NH_4OH$ (weak base) + $NH_4Cl$ (salt of weak base and strong acid) forms a basic buffer.$B$. $HCl$ (strong acid) + $NaCl$ (salt of strong acid and strong base) does not form a buffer.$C$. $NH_4OH + HCl$ in $2 : 1$ mole ratio:Reaction: $NH_4OH + HCl \rightarrow NH_4Cl + H_2O$Initial moles: $2 \ mol$ of $NH_4OH$ and $1 \ mol$ of $HCl$.After reaction: $1 \ mol$ of $NH_4OH$ remains and $1 \ mol$ of $NH_4Cl$ is formed.Since the final mixture contains a weak base $(NH_4OH)$ and its salt $(NH_4Cl)$,it acts as a buffer.Therefore,both $A$ and $C$ exhibit buffer action.

In which of the following combinations is buffer action expected?
$A$. $NH_4OH + NH_4Cl$
$B$. $HCl + NaCl$
$C$. $NH_4OH + HCl$ in $2 : 1$ mole ratio
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In which of the following combinations is buffer action expected?$A$. $NH_4OH + NH_4Cl$$B$. $HCl + NaCl$$C$. $NH_4OH + HCl$ in $2 : 1$ mole ratioSelect the correct answer using the code given below: