GATE XL year:2023 PYQs & Answers — Page 3

Questions 21–30 of 122. Imported answers require independent review unless marked reviewed.

Topic practice 122 questionsPage 3 of 13

A mixture of four peptides, PKRK, RGERV, YRGV and LVVP, is loaded onto an ion-exchange column at pH = 7.2. If carboxymethyl (CM) cellulose is used as the stationary phase of this column, then which peptide elutes first?

Given:

P = Proline, Y = Tyrosine, V = Valine, G = Glycine, K = Lysine, R = Arginine, E = Glutamic acid

Your answerChoose one option.

PKRK

RGERV

YRGV

LVVP

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Match the coordination complexes given in Column I with the most appropriate properties in Column II. (Given: Atomic numbers of Mn: 25; Co: 27; Ni: 28)

Column I — Coordination complexes: E. [Mn(H₂O)₆]²⁺ F. [CoF₆]³⁻ G. [NiCl₄]²⁻ H. [Ni(CN)₄]²⁻

Column II — Properties:

5.92 Bohr Magneton (BM)

CFSE = 0.4 Δₒ

Metal ion hybridisation is sp³

Diamagnetic

Your answerChoose one option.

E-1, F-2, G-3, H-4

E-2, F-1, G-4, H-3

E-4, F-2, G-1, H-3

E-1, F-4, G-3, H-2

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Compounds P and Q undergo E2 elimination with reaction rate constants of k₁ and k₂, respectively, as shown below. Which is/are the CORRECT option(s)?

Your answerSelect all correct options. You can choose more than one.

k₁ > k₂

k₂ > k₁

Most stable conformer of P gives the product

Most stable conformer of Q gives the product

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According to Hard-Soft Acid-Base (HSAB) principle, the CORRECT option(s) for the solubility trend in water is/are

Your answerSelect all correct options. You can choose more than one.

AgF > AgCl > AgBr > AgI

LiBr > LiCl > LiF

AgF < AgCl < AgBr < AgI

LiBr < LiCl < LiF

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Compound X gives alcohol P as the major product for the reaction shown below. Suitable option(s) for X is/are

Your answerSelect all correct options. You can choose more than one.

Diagram for Life Sciences question 25 (figure 2)

Diagram for Life Sciences question 25 (figure 3)

Diagram for Life Sciences question 25 (figure 4)

Diagram for Life Sciences question 25 (figure 5)

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The number of radial node(s) for the valence orbital of U(III) ion is _____ (in integer). (Given: Atomic number of U is 92)

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E° = 1.10 V for the following cell reaction:

For this reaction, the equilibrium constant is

at 298 K. The value of

is _____ (rounded off to two decimal places).

(Given: F = 96485 C mol

, R = 8.314 J K

mol

)

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Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].

Assertion [a]: On a per carbon basis, palmitic acid yields more ATP than glucose.

Reason [r]: Carbons in palmitic acid are more reduced than those in glucose.

Your answerChoose one option.

Both [a] and [r] are true and [r] is the correct reason for [a]

Both [a] and [r] are true but [r] is not the correct reason for [a]

[a] is true but [r] is false

[a] is false but [r] is true

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When cell components are fractionated by sedimentation, the correct order (from lower to higher graviational force, g) in which the components get separated is ______.

Your answerChoose one option.

nuclei, mitochondria, microsomes, and ribosomes

microsomes, mitochondria, ribosomes, and nuclei

nuclei, ribosomes, mitochondria, and microsomes

ribosomes, microsomes, mitochondria, and nuclei

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In a population, the probability of a susceptible individual getting infected with SARS-CoV-2 is low when a majority of individuals in the population becomes immune to this virus. This phenomenon is known as ______.

Your answerChoose one option.

innate immunity

adaptive immunity

active immunity

herd immunity

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GATE XL year:2023 PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30