GATE CY exam:gate PYQs & Answers — Page 61

Questions 601–610 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 61 of 65

The characteristic feature of an electron spin resonance (ESR) spectrum of frozen aqueous solution of CuSO

·5H

O at 77 K is

Your answerChoose one option.

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The most suitable reagent for the following transformation is

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Li / Liq. NH₃

PtO₂ / H₂

LiAlH₄

B₂H₆

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The major products M and N formed in the following reactions are

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Diagram for Chemistry question 18 (figure 2)

Diagram for Chemistry question 18 (figure 3)

Diagram for Chemistry question 18 (figure 4)

Diagram for Chemistry question 18 (figure 5)

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The

NMR spectrum of acetone-d₆ has a signal at 30 ppm as a septet in the intensity ratio

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1 : 6 : 15 : 20 : 15 : 6 : 1

1 : 3 : 6 : 7 : 6 : 3 : 1

1 : 2 : 3 : 5 : 3 : 2 : 1

1 : 3 : 7 : 10 : 7 : 3 : 1

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The major product formed in the following reaction is

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Diagram for Chemistry question 20 (figure 2)

Diagram for Chemistry question 20 (figure 3)

Diagram for Chemistry question 20 (figure 4)

Diagram for Chemistry question 20 (figure 5)

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The major product obtained in the following reaction is

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Diagram for Chemistry question 21 (figure 2)

Diagram for Chemistry question 21 (figure 3)

Diagram for Chemistry question 21 (figure 4)

Diagram for Chemistry question 21 (figure 5)

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In the two step reaction sequence given below, the starting bis-sulfone acts as

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a dienophile and synthetic equivalent of acetylene

a dienophile and synthetic equivalent of ethylene

a dipolarophile and synthetic equivalent of acetylene

a dipolarophile and synthetic equivalent of ethylene

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The major product formed in the following photochemical reaction is

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Diagram for Chemistry question 23 (figure 2)

Diagram for Chemistry question 23 (figure 3)

Diagram for Chemistry question 23 (figure 4)

Diagram for Chemistry question 23 (figure 5)

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The product formed in the following reaction is

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a 1:1 mixture of

Diagram for Chemistry question 24 (figure 2)

and

Diagram for Chemistry question 24 (figure 3)

Diagram for Chemistry question 24 (figure 4)

Diagram for Chemistry question 24 (figure 5)

Diagram for Chemistry question 24 (figure 6)

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The number of possible stereoisomers for cyclononene is __________

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GATE CY exam:gate PYQs

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25