GATE CY kind:question PYQs & Answers — Page 24

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Questions 231–240 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 24 of 65

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

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)

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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)

Your answerChoose one option.

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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The major product obtained by the treatment of (

-C

)

Ni with Na/Hg in ethanol is

Your answerChoose one option.

(

-C

)(

-C

)Ni

(

-C

)

(

-C

)(

-C

)Ni

(

-C

)

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The number of shared corners of the constituent SiO₄ units in orthosilicate, pyrosilicate, cyclic silicate and sheet silicate, respectively, are

Your answerChoose one option.

0, 1, 2 and 3

2, 3, 0 and 1

0, 3, 1 and 2

1, 2, 3 and 0

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Concentration of Q in a consecutive reaction

is given by

, where

is the initial concentration of P. If the value of

, the value of

that leads to the longest waiting time for Q to reach its maximum is

Your answerChoose one option.

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The wavefunction for Be

in a certain state is given by

, where

is the normalization constant,

is the distance of electron from the nucleus and

is the Bohr radius. The most probable distance of the electron from the nucleus in this state is

Your answerChoose one option.

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Match the following

Column I

(P) Associated Legendre polynomials (Q) Hermite polynomials (R) Associated Laguerre polynomials (S) Trigonometric functions

Column II

(I) Harmonic oscillator (II) Particle in a box model (III) Angular part of H atom (IV) Radial part of H atom

Your answerChoose one option.

P→II, Q→I, R→IV, S→II

P→II, Q→IV, R→II, S→I

P→IV, Q→I, R→III, S→II

P→II, Q→III, R→IV, S→I

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