Haloalkanes & Haloarenes

Correct order of $\mathrm{S}_{\mathrm{N}} 2$ reaction is

Correct order for reaction with alcoholic $\mathrm{KOH}$ is

The decreasing order of $\mathrm{S}_{\mathrm{N}} 2$ reaction for the given compounds is

Assertion : Chlorobenzene is more reactive than benzene towards the electrophilic substitution reaction. Reason : Resonance destabilises the carbocation.

What happens when chloroform is left open in air in the presence of sunlight?

Which one of the following forms propanenitrile as the major product?

Which of the following does not give nitroalkane?

An aromatic compound $\mathrm{C}_7 \mathrm{H}_6 \mathrm{Cl}_2(A)$, gives $\mathrm{AgCl}$ on boiling with alcoholic $\mathrm{AgNO}_2$ solution and yields $\mathrm{C}_7 \mathrm{H}_7 \mathrm{OCl}$ on treatment with sodium…

$\mathrm{PhCH}_2 \mathrm{Cl} \stackrel{\text { aq. NaCN }}{\longrightarrow} ? \stackrel{\text { Catalytic hydrogenation }}{\longrightarrow}$ The final product $(U)$ is :

$$ \text { Assertion : } $$ Reason : It follows with formation of more stable carbocation.

Assertion : Rate of reaction of alkyl halide in Williamson's synthesis reaction is $1^{\circ} R X>2^{\circ} R X$ $>3^{\circ} R X$. Reason : It is a type of bimolecular substitution reaction $\left(S_{\mathrm{N}}…

Assertion : $\mathrm{C}_2 \mathrm{H}_5 \mathrm{Br}$ reacts with alcoholic solution of $\mathrm{AgNO}_2$ to form nitroethane as the major product. Reason : $\mathrm{NO}_2^{-}$is an ambidient ion.