GATE CY topic:chemical-sciences PYQs & Answers — Page 38

Home
GATE
Chemistry
Topics
topic:chemical-sciences

Questions 371–380 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 38 of 65

In the following reaction

the major products X and Y, respectively, are:

Your answerChoose one option.

Diagram for Chemistry question 36 (figure 2)

Diagram for Chemistry question 36 (figure 3)

Diagram for Chemistry question 36 (figure 4)

Diagram for Chemistry question 36 (figure 5)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The major products P and Q formed in the following reactions [two reaction schemes shown], respectively, are:

Your answerChoose one option.

Diagram for Chemistry question 37 (figure 2)

Diagram for Chemistry question 37 (figure 3)

Diagram for Chemistry question 37 (figure 4)

Diagram for Chemistry question 37 (figure 5)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The major product formed in the reaction of (2R,3R)-2-bromo-3-methylpentane with NaOMe is:

Your answerChoose one option.

(Z)-3-methylpent-2-ene

(E)-3-methylpent-2-ene

(2R,3R)-2-methoxy-3-methylpentane

(2S,3R)-2-methoxy-3-methylpentane

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The major product formed in the following reaction [substrate shown; (i) LDA (1.1 equiv), (ii) PhCH₂Br (1.1 equiv), (iii) LiAlH₄ (3 equiv)] is:

Your answerChoose one option.

Diagram for Chemistry question 39 (figure 2)

Diagram for Chemistry question 39 (figure 3)

Diagram for Chemistry question 39 (figure 4)

Diagram for Chemistry question 39 (figure 5)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Hexane and heptane are completely miscible. At 25 °C, the vapor pressures of hexane and heptane are 0.198 atm and 0.06 atm, respectively. The mole fractions of hexane and heptane in the vapor phase for a solution containing 4 M hexane and 6 M heptane, respectively, are:

Your answerChoose one option.

0.688 and 0.312

0.400 and 0.600

0.312 and 0.688

0.600 and 0.400

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The correct order of Lewis acid strengths of BF₂Cl, BFClBr, BF₂Br and BBr₂ is:

Your answerChoose one option.

BF₂Cl > BFClBr > BF₂Br > BBr₂

BBr₂ > BFClBr > BF₂Br > BF₂Cl

BF₂Cl > BF₂Br > BFClBr > BBr₂

BFClBr > BBr₂ > BF₂Cl > BF₂Br

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The correct order of increasing intensity (molar absorptivity) of the UV-visible absorption bands for the ions [Ti(H₂O)₆]³⁺, [Mn(H₂O)₆]²⁺, [CrO₄]²⁻, and [NiCl₄]²⁻ is:

Your answerChoose one option.

[Ti(H₂O)₆]³⁺ < [Mn(H₂O)₆]²⁺ < [CrO₄]²⁻ < [NiCl₄]²⁻

[Mn(H₂O)₆]²⁺ < [Ti(H₂O)₆]³⁺ < [NiCl₄]²⁻ < [CrO₄]²⁻

[NiCl₄]²⁻ < [Ti(H₂O)₆]³⁺ < [Mn(H₂O)₆]²⁺ < [CrO₄]²⁻

[Ti(H₂O)₆]³⁺ < [NiCl₄]²⁻ < [CrO₄]²⁻ < [Mn(H₂O)₆]²⁺

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The correct statement(s) about the concentration of Na⁺ and K⁺ ions in animal cells is/are:

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

[K⁺] inside the cell > [K⁺] outside the cell

[Na⁺] inside the cell > [Na⁺] outside the cell

[Na⁺] inside the cell < [Na⁺] outside the cell

[K⁺] inside the cell < [K⁺] outside the cell

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The correct statement(s) about actinides is/are:

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

The 5f electrons of actinides are bound less tightly than the 4f electrons.

The trans uranium elements are prepared artificially.

All the actinides are radioactive.

Actinides do not exhibit actinide contraction.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The number of photons emitted per nanosecond by a deuterium lamp (400 nm) having a power of 1 microwatt (rounded off to the nearest integer) is ______. [h = 6.626 × 10⁻³⁴ kg m² s⁻¹; c = 3.0 × 10⁸ m s⁻¹]

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE CY topic:chemical-sciences PYQs

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45