GATE CY topic:chemical-reactions PYQs & Answers — Page 28

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Questions 271–280 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 28 of 65

The major product M formed in the following reaction is

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Diagram for Chemistry question 11 (figure 2)

Diagram for Chemistry question 11 (figure 3)

Diagram for Chemistry question 11 (figure 4)

Diagram for Chemistry question 11 (figure 5)

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The starting material Y in the following reaction is

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Diagram for Chemistry question 12 (figure 2)

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Diagram for Chemistry question 12 (figure 5)

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The major product in the given reaction is Q. The mass spectrum of Q shows { [M] = molecular ion peak}

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[M], [M+2] and [M+4] with relative intensity of 1:2:1

[M] and [M+2] with relative intensity of 1:1

[M], [M+2] and [M+4] with relative intensity of 1:3:1

[M] and [M+2] with relative intensity of 2:1

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A tripeptide on treatment with PhNCS (pH = 8.0) followed by heating with dilute HCl added a cyclic compound M and a dipeptide. The dipeptide on treatment with PhNCS (pH = 8.0) followed by heating with dilute HCl added a cyclic compound N and an acyclic compound O. The CORRECT sequence (from N- to C-terms) of the tripeptide is

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glycine-phenylalanine-valine

valine-phenylalanine-glycine

glycine-tyrosine-valine

glycine-phenylalanine-alanine

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The major product M in the following reaction is

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Diagram for Chemistry question 15 (figure 2)

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The major product T formed in the following reaction is

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Diagram for Chemistry question 16 (figure 2)

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In differential thermal analysis (DTA)

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the temperature differences between the sample and reference are measured as a function of temperature

the differences in heat flow into the reference and sample are measured as a function of temperature

the change in the mass of the sample is measured as a function of temperature

the glass transition is observed as a sharp peak

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The

resonance Raman stretching frequency (cm

) of the coordinated dioxygen in oxy-hemoglobin and oxy-hemocyanin appears, respectively, nearly at

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1136 and 744

1550 and 744

744 and 1136

744 and 1550

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The number of metal-metal bond(s), with

, and

character, present in [Mo

(CH

)

] complex is(are), respectively,

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1, 2, 1

1, 2, 0

1, 1, 0

1, 1, 1

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and

are the normalized eigenfunctions of two hydrogen atoms H

and H

, respectively. If

, the option that is ALWAYS CORRECT is

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imaginary constant

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GATE CY topic:chemical-reactions PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20