2019 · Paper 1

Complete GATE XL 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 16–18 of 125. Imported answers require review unless explicitly marked reviewed.

Question 6

Open question

XL-PMCQ2 marksNeeds review

For the reaction mechanism,



;



. For this step, assume



.



: rate constant for this step. The rate law is

Your answerChoose one option.

A.



B.



C.



D.



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Question 7

Open question

XL-PMCQ2 marksNeeds review

Match the type of reaction in Group-1 with the most appropriate description in Group-2.

Group 1	Group 2
P — Hydroboration-oxidation	1 — Electrophilic aromatic substitution
Q — Nucleophilic aromatic substitution	2 — Oxaphosphetane intermediate
R — Wittig reaction	3 — Meisenheimer complex
S — Friedel-Crafts reaction	4 — Anti-Markownikoff’s product

Your answerChoose one option.

A.

P-2, Q-4, R-1, S-3

B.

P-4, Q-3, R-1, S-2

C.

P-4, Q-3, R-2, S-1

D.

P-2, Q-1, R-4, S-3

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Question 8

Open question

XL-PMCQ2 marksNeeds review

The reactants P and Q in the following reaction are



Your answerChoose one option.

A.



B.



C.



D.



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