Types of Organic Reactions and Their Mechanism

Which one of the following carbonyl compound when treated with dilute acid forms the more stable carbocation?

Write correct order of stability of following carbocations :

            

          

Rank the following free radicals in order of decreasing stability:

$\left(\text{I}\right){\text{C}}_6{\text{H}}_5\stackrel{•}{\text{C}}{\text{HC}}_6{\text{H}}_5$

$\left(\text{I}\text{I}\right){\text{C}}_6{\text{H}}_5\stackrel{•}{-\text{C}\text{H}}-\text{C}\text{H}={\text{C}\text{H}}_2$

$\left(\text{I}\text{I}\text{I}\right)\text{C}{\text{H}}_3\stackrel{•}{-\text{C}\text{H}}-\text{C}{\text{H}}_3$

$\left(\text{I}\text{V}\right){\text{C}}_6{\text{H}}_5\stackrel{•}{-\text{C}\text{H}}-\text{C}{\text{H}}_3$

$\left(\text{V}\right)\text{C}{\text{H}}_3{\text{CH}}_2{\text{CH}}_2{{\text{CH}}_2\stackrel{•}{\text{C}}\text{H}}_2$

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The reaction of  –



with HBr gives

Assertion. Tertiary carbocations are generally formed more easily than primary carbocations. 

Reason. Hyperconjugation as well as inductive effect due to additional alkyl groups stabilise tertiary carbocations. 

Define intramolecular elimination reactions.

What is ${\mathrm{E}}_{1\mathrm{cB}}$ elimination reaction?

Why ${\mathrm{E}}_2$ reactions are stereoselective?

Define stereospecificity of an organic reaction.

Define stereoselectivity of an organic reaction.

Define Regioselectivity of an organic reaction.

Define Regiospecificity of an organic reaction.

What are trans and syn addition?

Write an example of an aromatic unimolecular nucleophilic substitution reaction.

Write the hydrolysis reaction of acyl chlorides.

What is allylic nucleophilic substitution reaction.