GATE CY format:mcq PYQs & Answers — Page 37

Questions 361–370 of 394. Imported answers require independent review unless marked reviewed.

Topic practice 394 questionsPage 37 of 40

The

NMR spectrum of acetone-d₆ has a signal at 30 ppm as a septet in the intensity ratio

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1 : 6 : 15 : 20 : 15 : 6 : 1

1 : 3 : 6 : 7 : 6 : 3 : 1

1 : 2 : 3 : 5 : 3 : 2 : 1

1 : 3 : 7 : 10 : 7 : 3 : 1

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The major product formed in the following reaction is

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Diagram for Chemistry question 20 (figure 2)

Diagram for Chemistry question 20 (figure 3)

Diagram for Chemistry question 20 (figure 4)

Diagram for Chemistry question 20 (figure 5)

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The major product obtained in the following reaction is

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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)

Diagram for Chemistry question 21 (figure 5)

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In the two step reaction sequence given below, the starting bis-sulfone acts as

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a dienophile and synthetic equivalent of acetylene

a dienophile and synthetic equivalent of ethylene

a dipolarophile and synthetic equivalent of acetylene

a dipolarophile and synthetic equivalent of ethylene

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The major product formed in the following photochemical reaction is

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Diagram for Chemistry question 23 (figure 2)

Diagram for Chemistry question 23 (figure 3)

Diagram for Chemistry question 23 (figure 4)

Diagram for Chemistry question 23 (figure 5)

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The product formed in the following reaction is

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a 1:1 mixture of

Diagram for Chemistry question 24 (figure 2)

and

Diagram for Chemistry question 24 (figure 3)

Diagram for Chemistry question 24 (figure 4)

Diagram for Chemistry question 24 (figure 5)

Diagram for Chemistry question 24 (figure 6)

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In cyclophosphazenes,

(X = F, Cl, Br and Me), the strength of P–N

-bond varies with X in the order

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F > Cl > Br > Me

Me > F > Cl > Br

Br > Cl > F > Me

Me > Br > Cl > F

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The structure type and shape of the polyhedral (skeletal) framework of the carborane,

, respectively, are

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ido and dodecahedron

closo and icosahedron

nido and icosahedron

closo and dodecahedron

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is the octahedral splitting energy and P is the electron pairing energy, then the crystal-field stabilization energy (CFE) of

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The rates of substitution for the following reaction vary with L in the order

[Pt complex: Et₃P and Cl ligands in hashed wedges; L and PEt₃ ligands in solid wedges] + py → [Pt complex: Et₃P and py ligands in hashed wedges; L and PEt₃ ligands in solid wedges]⁺ + Cl⁻

L = CH₃⁻, Cl⁻, Ph⁻ and H⁻

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CH₃⁻ > Cl⁻ > Ph⁻ > H⁻

Cl⁻ > Ph⁻ > H⁻ > CH₃⁻

Ph⁻ > CH₃⁻ > H⁻ > Cl⁻

H⁻ > CH₃⁻ > Ph⁻ > Cl⁻

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GATE CY format:mcq PYQs

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 36

Question 37

Question 38

Question 39