NEET UG CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

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When the concentration of alkyl halide is triple and concentration of

\mathop {\text{O}}\limits^\ominus {\text{H}}

is reduced to half, the rate of

\mathrm{SN}_2

reaction increased by:

View answer and explanation

Correct option: B

1.5 times

Option B (1.5 times) is correct because the rate of an

SN_2

reaction is directly proportional to the concentration of the alkyl halide and the nucleophile. Tripling the alkyl halide concentration increases the rate by a factor of 3, while halving the hydroxide concentration decreases the rate by a factor of 2, resulting in a net increase of 3/2 = 1.5 times.

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Which of the following compounds is an example of Freon? Which one of the following is most reactive towards aqueous

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\mathrm{CHC}{\mathrm{l}_3}\mathrm{\;from\;\;}{\mathrm{C}_2}{\mathrm{H}_5}\mathrm{OH\;and\;bleaching}\;

powder? For the reaction

\mathrm{RCH}_{2} \mathrm{Br}+\mathrm{I}^{-} \stackrel{\text { Acetone }}{\longrightarrow} \underset{\text { major }}{\mathrm{RCH}_{2}} \mathrm{I}+\mathrm{Br}^{-}

The correct statement is A solution of

Ni{(N{O_3})_2}

is electrolyzed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode? Most reactive compound towards nucleophilic addition among the following is