MCQ
$KCN$ reacts readily to give a cyanide with
- AEthyl alcohol
- ✓Ethyl bromide
- CBromobenzene
- DChlorobenzene
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| Observation | $[A]$ | $[B]$ | Rate of reaction |
| $1$ | $0.1$ | $0.1$ | $2\times10^{-3}\, mol\, L^{-1}\,sec^{-1}$ |
| $2$ | $0.2$ | $0.1$ | $0.4\times10^{-2}\, mol\, L^{-1}\,sec^{-1}$ |
| $3$ | $0.1$ | $0.2$ | $1.4\times10^{-2}\, mol\, L^{-1}\,sec^{-1}$ |
(Rounded off to the nearest integer)
$\left[ K _{ f \left( H _{2} O \right)}=1.86 \,K\, kg mol ^{-1}\right]$
