Four organic reactions are given below:A CH3CH 3 oCH2 CH 2 + H 2B nCH2 CH 2 o( CH 2 CH 2 ) nC CH2 CH 2 + HBr oCH 3CH 2BrD CH3CH 2Br + H 2O oCH 3CH 2OH + HBr(a) Which reaction is a substitution reaction?(1)ABCD(b) Which reaction is an electrophilic addition reaction?(1)ABCD(c) Which reaction involves initial attack by a nucleophile?(1)ABCD(d) Which reaction requires an initiator?(1)ABCD(Total for Question 11 = 4 marks)www.dynamicpapers.com
Question
Four organic reactions are given below:A CH3CH 3 oCH2 CH 2 + H 2B nCH2 CH 2 o( CH 2 CH 2 ) nC CH2 CH 2 + HBr oCH 3CH 2BrD CH3CH 2Br + H 2O oCH 3CH 2OH + HBr(a) Which reaction is a substitution reaction?(1)ABCD(b) Which reaction is an electrophilic addition reaction?(1)ABCD(c) Which reaction involves initial attack by a nucleophile?(1)ABCD(d) Which reaction requires an initiator?(1)ABCD(Total for Question 11 = 4 marks)www.dynamicpapers.com
Solution
(a) The substitution reaction is D. In this reaction, the bromine atom in CH3CH2Br is substituted by an OH group from water to form CH3CH2OH.
(b) The electrophilic addition reaction is C. In this reaction, HBr adds across the double bond of CH2CH2, with the bromine attaching to the carbon atom that can form the most stable carbocation.
(c) The reaction that involves initial attack by a nucleophile is D. In this reaction, the OH- ion in water acts as a nucleophile and attacks the carbon atom bonded to the bromine atom in CH3CH2Br.
(d) The reaction that requires an initiator is B. In this reaction, the polymerization of ethene to form polyethene requires an initiator to start the reaction.
Similar Questions
Which of the following reactions is an example of nucleophilic substitution reaction ?
If an aromatic substitution reaction has a positively charged intermediate, what type of reaction is it?Select answer from the options belowAn Electrophilic Aromatic Substitution ReactionAn Addition ReactionA Nucleophilic Aromatic Substitution ReactionAn Elimination-Addition Reaction
The general mechanism for an electrophilic aromatic substitution involves which steps?Select answer from the options belowStep 1: Proton TransferStep 2: Nucleophilic AttackStep 1: Nucleophilic AttackStep 2: Proton TransferStep 1: Nucleophilic AttackStep 2: RearrangementStep 3: Proton TransferStep 1: Nucleophilic AttackStep 2: RearrangementStep 3: Loss of a Leaving Group
Nucleophilic substitution reaction is given by those compounds which have nucleophilic group as a good leaving group. The leaving group is a electron withdrawing group, it should be stable after leaving with bonding pair of electrons and it should have high polarisability.Which of the following compound will give nucleophilic substitution reactions?
Electrophilic aromatic substitution reaction, Explain in detail with a suitable example.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.