GATE CY year:2025 PYQs & Answers — Page 3

Questions 21–30 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 3 of 7

The Vaska’s complex trans-IrCl(CO)(PPh₃)₂ shows a band at 1967 cm⁻¹ for the νCO stretching vibration in its infrared spectrum. The complex(es) that will show an increase in the νCO stretching vibration from 1967 cm⁻¹ is/are

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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)

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Under the conditions mentioned for each reaction, the reaction(s) that would give borazine (B₃N₃H₆) as the major product is/are

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The essential symmetry(ies) for a monoclinic crystal system is/are the presence of

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one C₃ axis

one C₂ axis

one C₄ axis

one C₆ axis

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Compound(s) that show(s) an intense peak at m/z 120 in the EI mass spectrum is/are

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Diagram for Chemistry question 24 (figure 2)

Diagram for Chemistry question 24 (figure 3)

Diagram for Chemistry question 24 (figure 4)

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The correct option(s) of reagents and reaction sequences suitable for carrying out the following transformation is/are

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(i) NBS, (PhCOO)₂; (ii) aq. NaOH; (iii) active MnO₂; (iv) Li/liq. NH₃, t-BuOH

(i) m-CPBA; (ii) BF₃·Et₂O

(i) SeO₂; (ii) Dess-Martin periodinane; (iii) K[ BH(s-Bu)₃] (K-selectride)

(i) dil. KMnO₄; (ii) NaIO₄

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Among the given options, the possible product(s) that can be obtained from the following reaction is/are

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Diagram for Chemistry question 26 (figure 2)

Diagram for Chemistry question 26 (figure 3)

Diagram for Chemistry question 26 (figure 4)

Diagram for Chemistry question 26 (figure 5)

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Choose the correct option(s) with regard to mechanism of the following transformation.

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It proceeds through divinyl cyclopropane rearrangement.

It involves a diradical intermediate.

It proceeds through di-π-methane rearrangement.

It proceeds through [2+2+2] cycloaddition reaction.

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Consider two non-interacting particles confined to a one-dimensional box with infinite potential barriers. Their wavefunctions are

and

and energies are

and

, respectively. The INCORRECT statement(s) about this system is/are

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The total energy is

The total wavefunction is

The total energy is

The total wavefunction is

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The thermodynamic criterion/criteria for a spontaneous process is/are

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at constant

and

at constant

and

at constant

and

at constant

and

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Xe and F

in 1:1 molar ratio when mixed in a closed flask and kept in the sunlight for a day, gave white crystals of a compound Q. Two equivalents of Q on reaction with one equivalent of AsF

gave an ionic compound X

with the cation having two Xe atoms. The total number of lone pairs present on the cation X

is _____ (in integer).

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GATE CY year:2025 PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30