GATE CY exam:gate PYQs & Answers — Page 19

Questions 181–190 of 650. Imported answers require independent review unless marked reviewed.

The correct option(s) that give(s) P as the major product (are)

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

Diagram for Chemistry question 51 (figure 2)

Diagram for Chemistry question 51 (figure 3)

Diagram for Chemistry question 51 (figure 4)

Diagram for Chemistry question 51 (figure 5)

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The correct statement(s) regarding P, Q, R, and S is (are):

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P reacts faster than Q with PhSNa in DMF as a solvent.

Q reacts faster than P with NaN₃ in DMF as a solvent.

R reacts faster than S when treated with TsCl/Et₃N in DCM as a solvent.

R gets oxidized faster than S when reacted with CrO₃ in DCM as a solvent.

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Consider the following reaction sequence. The correct option(s) is (are)

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M =

Diagram for Chemistry question 53 (figure 2)

N = Na-Hg/MeOH

X = LDA; O =

Diagram for Chemistry question 53 (figure 3)

L = acrolein; O =

Diagram for Chemistry question 53 (figure 4)

X = LiAlH₄; L = (vinylsulfonyl)benzene

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Consider the following reaction sequence where M and N are the major products. The correct option(s) is (are)

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M = [cyclobutane structure with H substituents shown as solid wedges, terminal double bonds at the two upper ring carbons, and EtO₂C substituents shown at the lower positions]

Diagram for Chemistry question 54 (figure 2)

M = [cyclobutane structure with two H substituents at each side, and EtO₂C substituents shown at the lower positions]

Diagram for Chemistry question 54 (figure 3)

N = [cyclooctatetraene-like ring with two EtO₂C substituents at the lower positions]

Diagram for Chemistry question 54 (figure 4)

N = [cyclobutane structure fused to two vinyl groups, with EtO₂C substituents at the lower positions]

Diagram for Chemistry question 54 (figure 5)

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The correct statement(s) about the relationship for the H-atoms in the following compounds is (are):

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H₁ and H₃ are enantiotopic; H₂ and H₃ are diastereotopic.

H₁ and H₃ are diastereotopic; H₂ and H₃ are enantiotopic.

H₅ and H₇ are enantiotopic; H₆ and H₇ are homotopic.

H₅ and H₇ are homotopic; H₆ and H₇ are enantiotopic.

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Among the following, the correct statement(s) is (are):

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the normalization factor of a Slater determinant for a 3-electron atom is

the number of nodes in the radial wave function of 3s orbital of a hydrogen atom is the same as the number of nodes in the angular wave function of a 4d orbital of hydrogen atom.

the energy separation between any two adjacent states is same for a harmonic oscillator, while it is different for a rigid rotor.

the magnitude of the total spin angular momentum of an

electron is the negative of that of a

electron.

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Among the following, the correct statement(s) is (are):

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C₂ symmetry element is present in H₂O and H₂O₂ but NOT in PCl₅.

both C₂ and C₃ symmetry elements are present in CCl₄ and SF₆.

one σₕ and three σᵈ symmetry elements are present in benzene.

σᵥ symmetry element is present in NH₃ but NOT in BF₃.

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ΔS° (in J mol⁻¹ K⁻¹) for the given reaction at 298 K is ______.

[Cu(H₂O)₆]²⁺ + en → [Cu(H₂O)₄(en)]²⁺ + 2H₂O

(Given: log K₁ = 10.6, where K₁ is the equilibrium constant, ΔH° = −54 kJ mol⁻¹ and R = 8.314 J mol⁻¹ K⁻¹)

(rounded off to two decimal places)

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The turnover frequency (in h⁻¹) of a reaction where 5 mol% of a catalyst is required for 90% conversion in 3 h is ____.

(rounded off to the nearest integer)

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In thermogravimetric analysis, 12.45 mg of CuSO₄·5H₂O was subjected to heating under N₂ atmosphere. At a particular temperature, there was a weight loss of 3.6 mg. The number of water molecule(s) lost per formula unit is ____.

(Given molar mass (in g mol⁻¹) of H = 1.0, O = 16.0, S = 32.0, and Cu = 63.5)

(rounded off to the nearest integer)

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GATE CY exam:gate PYQs

Question 51

Question 52

Question 53

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59

Question 60