Electrocyclic Reactions [Pericyclic] MCQs for CSIR UGC NET & GATE

Electrocyclic Reactions MCQs for CSIR NET & GATE Pericyclic Reactions Topic wise Assignment-1

QUIZ

Q1. Predict the orbital involved and rotation it goes through in the following Cyclization reaction.

(a) Ψ2 , Con-rotation
(b) Ψ2 , Dis-rotation
(c) Ψ3 , Con-rotation
(d) Ψ3 , Dis-rotation

Q2. For the following Electrocyclic reaction, choose the π system involved and rotation of p-orbitals.

[NET Dec YYYY]

(a) 4π, Con-rotation
(b) 4π, Dis-rotation
(c) 6π, Con-rotation
(d) 6π, Dis-rotation

Q3. Final product formed in the following reaction will be:

[NET Dec 2011]

Q4. The Major product formed in the following reaction is

[NET June 2012]

Q5. The number of π electrons participating and the pericyclic mode in the following reaction are:

[NET Dec 2013]

(a) 4 and conrotatory
(b) 4 and disrotatory
(c) 6 and conrotatory
(d) 6 and disrotatory

Q6. The following transformation proceeds through two consecutive processes, which are

[NET June 2016]

(a) 4π conrotatory and 6π conrotatory
(b) 4π disrotatory and 6π conrotatory
(c) 4π conrotatory and 6π disrotatory
(d) 4π disrotatory and 6π disrotatory

Q7. Major product formed in the following reaction will be

[GATE 2015]

Q8. Final product of the following reaction will be

Detailed Solution

Topic wise MCQs