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Chapter 2: Problem 100
Reaction of trans-2-phenyl-1-bromocyclohexane with hot alcoholic \(\mathrm{NaOH}\) gives (a) 3 -phenylcyclohexene (b) 1 -phenylcyclohexene (c) 2 -bromophenyl cyclohexane (d) 2 -phenyl cyclohexanol
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\(\mathrm{H}_{3} \mathrm{C}-\mathrm{C} \equiv \mathrm{CH}+\mathrm{CH}_{3} \mathrm{MgI} \longrightarrow(\mathrm{A})+\mathrm{CH}_{4}\) \((\mathrm{A})+\mathrm{CH}_{3} \mathrm{I} \longrightarrow(\mathrm{B})+\mathrm{MgI}_{2}\) (A) and (B) are (a) \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}-\mathrm{MgI}\) and \(\mathrm{CH}_{4}\) (b) \(\mathrm{H}_{3} \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}\) and \(\mathrm{CH}_{4}\) (c) \(\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{MgI}\) and \(\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}\) (d) \(\mathrm{H}_{3} \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{I}\) and
Which of the following reactions will result in 2,2-dibromopropane? (a) \(\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CH}+2 \mathrm{HBr} \rightarrow\) (b) \(\mathrm{CH}_{3}-\mathrm{CBr}=\mathrm{CH}_{2}+\mathrm{HBr} \rightarrow\) (c) \(\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}+\mathrm{Br}_{2} \rightarrow\) (d) \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHBr}+\mathrm{HBr} \rightarrow\)
The correct decreasing order of the acidity of hydrogen in acetylene, phenol, alcohol, ethylene and acetic acid is (a) Acetic acid \(>\) Phenol \(>\) alcohol \(>\) acetylene \(>\) ethylene (b) Phenol \(>\) acetic acid \(>\) alcohol \(>\) acetylene \(>\) ethylene (c) Acetic acid \(>\) alcohol \(>\) phenol \(>\) acetylene \(>\) ethylene (d) Acetic acid \(>\) acetylene \(>\) phenol \(>\) alcohol \(>\) ethylene
\(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CH}_{2}+\mathrm{ICl} \rightarrow\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CClCH}_{2} \mathrm{I}\) is an example of (a) anti Markovnikov addition to the double bond (b) a regioselective reaction (c) an electrophilic substitution reaction (d) a stereospecific reaction
Question contains Statement-1 and Statement-2 and has the following choices (a), (b), (c) and (d), out of which ONLY ONE is correct. (a) Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanation for Statement-1 (b) Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanation for Statement-1 (c) Statement- 1 is True, Statement- 2 is False (d) Statement-1 is False, Statement- 2 is True Statement 1 Alkynes are more reactive than alkenes in electrophilic addition reactions. and Statement 2 Electrophilic addition to both alkenes and alkynes involve a three membered cyclic intermediate and the bromonium ion type intermediate is less stable for an alkyne than for an alkene.
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