GATE XL kind:question PYQs & Answers — Page 39

Questions 381–390 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 39 of 124

Suitable reagent(s) to bring about the conversion of P to Q in good yield is/are

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

ClCH₂CH₂CH₃, AlCl₃

Diagram for Life Sciences question 15 (figure 2)

(CH₃)₂CHCOCl, AlCl₃; 2) H₂NNH₂, KOH

Diagram for Life Sciences question 15 (figure 3)

CH₂=C(CH₃)₂, HF

Diagram for Life Sciences question 15 (figure 4)

(CH₃)₂CHCOOCOCH(CH₃)₂, AlCl₃; 2) Zn(Hg), HCl

Diagram for Life Sciences question 15 (figure 5)

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Choose the CORRECT trend(s) of the first ionization energies among the following. (Given: Atomic numbers C: 6; N: 7; O: 8; F: 9; Si: 14; P: 15; S: 16; Cl: 17)

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

C < N > O < F

Si < P > S < Cl

C < N < O < F

Si < P < S < Cl

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The depression of freezing point of water (in K) for 0.1 molal solutions of NaCl and Na₂SO₄ are ΔT₁ and ΔT₂, respectively. Assuming the solutions to be ideal, the ratio ΔT₁/ΔT₂ is ____________ (rounded off to two decimal places).

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Considering cyclobutane to be planar, the number of planes of symmetry in the following compound is ____________ (in integer).

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The dipole moment (μ) of BrF is 1.42 D and the bond length is 176 pm. The atomic charge distribution (q) in the molecule is _____ (rounded off to two decimal places). (Given: 1 D = 3.3 × 10⁻³⁰ C m; the factor e (electronic charge) = 1.60 × 10⁻¹⁹ C)

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Consider two different paths in which the volume of an ideal gas doubles isothermally:

i) Reversible expansion (work done =

) ii) Irreversible expansion, with the external pressure equal to the final pressure of the gas (work done =

)

Here,

= ______________.

Your answerChoose one option.

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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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GATE XL kind:question PYQs

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24