Identify the major product $X$ in the following reaction: $CH_3-CH_2-CHF-CH_3 \xrightarrow[\Delta]{alc. KOH} X$ (Major)
- ABut$-2-$ene
- BBut$-2-$ene (cis)
- CBut$-1-$ene
- DNone of these
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In the dehydrohalogenation of $2$-bromobutane,which conformation leads to the formation of $cis$-but-$2$-ene?
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Which of the following pairs of compounds on heating gives butanenitrile?
Which among the following is $NOT$ a feature of $S_{N}2$ mechanism?
Consider the reactions.
$(i) \ (CH_3)_2CH-CH_2Br \xrightarrow{C_2H_5OH} (CH_3)_2CH-CH_2OC_2H_5 + HBr$
$(ii) \ (CH_3)_2CH-CH_2Br \xrightarrow{C_2H_5O^-} (CH_3)_2CH-CH_2OC_2H_5 + Br^-$
The mechanisms of reactions $(i)$ and $(ii)$ are respectively:
$(i) \ (CH_3)_2CH-CH_2Br \xrightarrow{C_2H_5OH} (CH_3)_2CH-CH_2OC_2H_5 + HBr$
$(ii) \ (CH_3)_2CH-CH_2Br \xrightarrow{C_2H_5O^-} (CH_3)_2CH-CH_2OC_2H_5 + Br^-$
The mechanisms of reactions $(i)$ and $(ii)$ are respectively:
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