GATE XL year:2023 PYQs & Answers — Page 2

Questions 11–20 of 122. Imported answers require independent review unless marked reviewed.

Topic practice 122 questionsPage 2 of 13

Which one among the following mixtures gives a buffer solution in water?

Your answerChoose one option.

CH₃COOH + CH₃COONa

CH₃COOH + NaCl

NaOH + NaCl

NaOH + CH₃COONa

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What is the major product formed in the given reaction?

Your answerChoose one option.

Diagram for Life Sciences question 12 (figure 2)

Diagram for Life Sciences question 12 (figure 3)

Diagram for Life Sciences question 12 (figure 4)

Diagram for Life Sciences question 12 (figure 5)

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The CORRECT order of stability of the given metal oxides is

Your answerChoose one option.

LiO₂ > NaO₂ > KO₂ > RbO₂

LiO₂ < NaO₂ < KO₂ < RbO₂

LiO₂ < NaO₂ > KO₂ > RbO₂

LiO₂ > NaO₂ < KO₂ < RbO₂

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Which of the following is/are CORRECT when two single complementary strands of DNA come together to form a double helix at a given temperature? (ΔS and ΔH are changes in entropy and enthalpy of the process, respectively.)

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

ΔS > 0

ΔS < 0

ΔH > 0

ΔH < 0

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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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GATE XL year:2023 PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20