GATE CY topic:chemical-sciences PYQs & Answers — Page 2

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topic:chemical-sciences

Questions 11–20 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 2 of 65

The major product formed in the following reaction is

Your answerChoose one option.

Diagram for Chemistry question 11 (figure 2)

Diagram for Chemistry question 11 (figure 3)

Diagram for Chemistry question 11 (figure 4)

Diagram for Chemistry question 11 (figure 5)

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The correct statement about the following quaternary ammonium ion is

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It has only C₂-symmetry, hence chiral

It has S₄-symmetry, hence achiral

It has no symmetry, hence chiral

It has a centre of symmetry, hence achiral

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The major product formed in the following reaction sequence is

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Diagram for Chemistry question 13 (figure 2)

Diagram for Chemistry question 13 (figure 3)

Diagram for Chemistry question 13 (figure 4)

Diagram for Chemistry question 13 (figure 5)

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The major product formed in the following reaction is

Your answerChoose one option.

Diagram for Chemistry question 14 (figure 2)

Diagram for Chemistry question 14 (figure 3)

Diagram for Chemistry question 14 (figure 4)

Diagram for Chemistry question 14 (figure 5)

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The species that undergoes

-elimination is

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[Rh(C₅H₅)(P(CH₃)₃)(C₂H₅)]⁺

[Rh(NH₃)₅(C₂H₅)]²⁺

[Pt(P(C₆H₅)₃)₂(C₆H₅)]

[Cr(CH₂Si(CH₃)₃)₄]

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According to molecular orbital theory, the correct ground state electronic configuration for [Co(NH₃)₆]³⁺ ion is

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The species which follows 18-electron rule is

(en = ethylenediamine)

Your answerChoose one option.

[Rh(PH₃)₃Cl]

[Co(NH₃)₆]²⁺

[V(CO)₆]⁻

[Ni(en)₃]²⁺

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The point group of CH₂=C=CH₂ is

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D₂h

C₂h

C₂v

D₂d

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Among the following, the one for which the infrared active vibrational modes are Raman inactive and vice versa is

Your answerChoose one option.

H₂O

trans-planar conformer of H₂O₂

eclipsed conformer of ethane

CH₄

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For the following reaction, A + B ⇌ X‡ → product If the value of Δ‡U° = 5/2 RT, then the value of Δ‡H° is (X‡ is an activated complex; Δ‡U° is standard change in internal energy; Δ‡H° is standard enthalpy of activation; R is gas constant; T is temperature)

Your answerChoose one option.

1/2 RT

3/2 RT

7/2 RT

5/2 RT

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GATE CY topic:chemical-sciences PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20