GATE CY format:mcq PYQs & Answers — Page 13

Questions 121–130 of 394. Imported answers require independent review unless marked reviewed.

Topic practice 394 questionsPage 13 of 40

The organometal catalyst for the following transformation is

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Diagram for Chemistry question 26 (figure 2)

Diagram for Chemistry question 26 (figure 3)

Diagram for Chemistry question 26 (figure 4)

Diagram for Chemistry question 26 (figure 5)

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Point group of naphthalene (C₁₀H₈) is

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D₂d

D₂h

D₃d

D₃h

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The INCORRECT statement is

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Zero-point energy of a quantum mechanical harmonic oscillator of frequency ν is

Energy level of a quantum mechanical rigid rotor is inversely proportional to its moment of inertia

The time independent Schrödinger equation for Li²⁺ can be solved exactly

Total angular momentum of an atomic system is equal to the sum of orbital angular momentum and spin angular momentum

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For an ideal gas, the molecular partition function in the canonical ensemble, that is proportional to the system volume (V), is the

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vibrational partition function

rotational partition function

electronic partition function

translational partition function

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Assertion (S): The total angular momentum for light atoms (low atomic number) is obtained by Russell-Saunders coupling, whereas jj-coupling is used for heavy atoms (high atomic number).

Reasoning (R): The spin-orbit interactions are weak in light atoms (low atomic number) and strong in heavy atoms (high atomic number).

The correct option is

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S and R are true; and R is the correct reason for S

S and R are true; but R is NOT the correct reason for S

S is true but R is false

S is false but R is true

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A compound,

, has the following spectral data;

NMR (ppm): 9.16 (s), 6.89 (d,

Hz), 6.64 (d,

Hz), 1.53 (s)

NMR (ppm): 154.7, 140.9, 127.1, 114.4, 40.7, 30.7

The structure of the compound is

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Diagram for Chemistry question 36 (figure 2)

Diagram for Chemistry question 36 (figure 3)

Diagram for Chemistry question 36 (figure 4)

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The major product formed in the given reaction sequence is

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Diagram for Chemistry question 37 (figure 2)

Diagram for Chemistry question 37 (figure 3)

Diagram for Chemistry question 37 (figure 4)

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E and F in the given reaction scheme are

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Diagram for Chemistry question 38 (figure 2)

Diagram for Chemistry question 38 (figure 3)

Diagram for Chemistry question 38 (figure 4)

Diagram for Chemistry question 38 (figure 5)

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M and N in the given reaction scheme are

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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)

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In the

H NMR spectrum, multiplicity of the signal (bold and underlined H atom) in the following species is

(I) [HNi(OPEt

)

]

(II) Ph

Si(Me)H (III) PH

(IV) (Cp*)

ZrH

(Cp* = pentamethylcyclopentadienyl)

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I- pentet, II- quartet, III- doublet and IV- singlet

I- pentet, II- singlet, III- singlet and IV- doublet

I- triplet, II- triplet, III- doublet and IV- doublet

I- singlet, II- quartet, III- singlet and IV- singlet

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GATE CY format:mcq PYQs

Question 26

Question 27

Question 28

Question 29

Question 30

Question 36

Question 37

Question 38

Question 39

Question 40