MCQ
Catalytic hydrogenation of benzene gives
- AXylene
- ✓Cyclohexane
- CBenzoic acid
- DToluene

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$P : 10\ ml, 0.1\ M\ NaOH + 5\ ml, 0.1\ M\ HCl$
$Q : 10\ ml, 0.1\ M\ NaOH + 15\ ml, 0.1\ M\ CH_3COOH$
$R : 10\ ml, 0.1\ M\ NH_3 + 10\ ml, 0.1\ M\ NH_4Cl$
$S : 10\ ml, 0.05\ M\ NaF + 5\ ml, 0.1\ M\ HF$
Which of above solutions act as buffer
$(1)$ $C{H_3}CH = CHC{H_2}C{H_3}$ $ \xrightarrow{HBr} $
$(2)$ $C{H_3}C{H_2}CH = C{H_2}$ $ \xrightarrow{HBr} $
$(3)$ $C{H_3}CH = CHC{H_3}$ $ \xrightarrow{Br_2} $
$(4)$ $C{H_3}C{H_2}CH = C{H_2}\mathop {}\limits_{{\rm{}}} $ $ \xrightarrow[Proxide]{HBr} $