GATE CY topic:chemical-reactions PYQs & Answers — Page 32

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topic:chemical-reactions

Questions 311–320 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 32 of 65

The reaction(s) that yield(s) 3-phenylcyclopentanone as the major product is(are)

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2-cyclopentenone; (a) Ph₂CuLi; (b) H₃O⁺

2-cyclopentenol; PhI, cat. Pd(OAc)₂; KOAc, DMF, 60 °C

2-cyclopentenone; (a) PhLi; (b) H₃O⁺

2-cyclopentenone; (a) LDA, THF, -78 °C, PhSeBr; (b) H₂O₂

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The reaction(s) that yield(s) M as the major product is(are)

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Diagram for Chemistry question 52 (figure 2)

Diagram for Chemistry question 52 (figure 3)

Diagram for Chemistry question 52 (figure 4)

Diagram for Chemistry question 52 (figure 5)

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The CORRECT statement(s) regarding B₁₀H₁₄ is(are)

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Brønsted acidity of B₁₀H₁₄ is higher than that of B₅H₉

Structurally B₁₀H₁₄ is a closo-borane

The metal-promoted fusion of B₅H₈⁻ produces B₁₀H₁₄

Both B₁₀H₁₄ and B₁₀H₁₂(SEt)₂ have the same number of valence electrons

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The CORRECT statement(s) about the Group-I metals is(are)

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Reactivity of Group-I metals with water decreases down the group

Among the Group-I metals, Li spontaneously reacts with N₂ to give a red-brown layer-structured material

Thermal stability of Group-I metal peroxides increases down the group

All the Group-I metal halide are high-melting colorless crystalline solids

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The compound(s) that satisfies/satisfy the 18-electron rule is(are) (Atomic number of Os = 76, Rh = 45, Mo = 42, and Fe = 26)

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Diagram for Chemistry question 55 (figure 2)

Diagram for Chemistry question 55 (figure 3)

Diagram for Chemistry question 55 (figure 4)

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For three operators

, and

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The difference between the number of gauche-butane interactions present in P and Q is

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The calculated magnetic moment (in BM, rounded off to two decimal places) of a Ce

complex is

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The state of the electron in a He

ion is described by the following normalized wavefunction,

. Here,

and

represent the radial and angular components of the eigenfunctions of He

ion, respectively, and

is an unknown constant. If the energy of the ion is measured in the above state, the probability (rounded off to two decimal places) of obtaining the energy of

atom unit is

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A certain wavefunction for the hydrogen-like atom is given by

. The number of node(s) in this wavefunction is

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GATE CY topic:chemical-reactions PYQs

Question 51

Question 52

Question 53

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59

Question 60