GATE CY format:mcq PYQs & Answers — Page 38

Questions 371–380 of 394. Imported answers require independent review unless marked reviewed.

Topic practice 394 questionsPage 38 of 40

The product formed in the reaction of

with

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For the following three alkenes, 1, 2 and 3, the rates of hydrogenation using Wilkinson’s catalyst at 25 °C vary in the order

1: cyclohexene; 2: alkene with CH₃ and C₂H₅ substituents on one alkene carbon and H on the other; 3: methyl-substituted cyclohexene

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1 > 3 > 2

1 > 2 > 3

2 > 1 > 3

2 > 3 > 1

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The metal ion and the macrocyclic skeleton present in the green pigment of plants, respectively, are

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Mg(II) and chlorin

Mg(II) and corin

Mn(II) and chlorin

Mg(II) and porphine

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The spinel structure of

has cubic close packed arrangement of oxide ions. The fractions of the octahedral and tetrahedral sites occupied by cations, respectively, are

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and

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The major product formed in the following reaction is

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Diagram for Chemistry question 46 (figure 2)

Diagram for Chemistry question 46 (figure 3)

Diagram for Chemistry question 46 (figure 4)

Diagram for Chemistry question 46 (figure 5)

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The product formed in the following photochemical reaction is

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Diagram for Chemistry question 47 (figure 2)

Diagram for Chemistry question 47 (figure 3)

Diagram for Chemistry question 47 (figure 4)

Diagram for Chemistry question 47 (figure 5)

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Among the following decahydroquinoline toluenesulfonates (Ts), the one that yields 9-methylamino-E-non-5-enal as a major product upon aqueous solvolysis is

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Diagram for Chemistry question 48 (figure 2)

Diagram for Chemistry question 48 (figure 3)

Diagram for Chemistry question 48 (figure 4)

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The product obtained in the following solvolysis reaction is

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a racemic mixture of trans 1,2-diacetoxycyclohexane

enantiomerically pure trans 1,2-diacetoxycyclohexane

racemic cis 1,2-diacetoxycyclohexane

a mixture of cis and trans 1,2-diacetoxycyclohexane

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The spectroscopic data for an organic compound with molecular formula C₁₀H₁₂O₂ are given below. IR band around 1750 cm⁻¹, ¹H NMR δ 7.3 (m, 5H), 5.85 (q, 1H, J = 7.2 Hz), 2.05 (s, 3H), 1.5 (d, 3H, J = 7.2 Hz) ppm. The compound is

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methyl 2-phenylpropionate

1-(phenylethyl) acetate

2-(phenylethyl) acetate

methyl 3-phenylpropionate

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