GATE CY kind:question PYQs & Answers — Page 9

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Questions 81–90 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 9 of 65

In the

H-NMR spectrum of the following molecule, the signal of proton Hₐ appears as

Your answerChoose one option.

singlet

triplet

quintet

quartet

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A disaccharide X does NOT show mutarotation in aqueous solution. Acidic hydrolysis of X affords two different monosaccharides. The disaccharide X is

Your answerChoose one option.

Diagram for Chemistry question 17 (figure 2)

Diagram for Chemistry question 17 (figure 3)

Diagram for Chemistry question 17 (figure 4)

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The symmetry element that does NOT belong to

point group is

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Rigid rotor wavefunctions are given by

. The wavefunctions

and

are given below

For a non-polar diatomic molecule, the value of transition dipole moment integral for transition between

and

is equal to

Your answerChoose one option.

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The translational, vibrational, and rotational molecular partition functions for a system containing ideal diatomic gas molecules in the canonical ensemble (N, V, T) are written as

, and

, respectively. The option that correctly defines their thermodynamic variable(s) dependency is

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The Vaska’s complex trans-IrCl(CO)(PPh₃)₂ shows a band at 1967 cm⁻¹ for the νCO stretching vibration in its infrared spectrum. The complex(es) that will show an increase in the νCO stretching vibration from 1967 cm⁻¹ is/are

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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)

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Under the conditions mentioned for each reaction, the reaction(s) that would give borazine (B₃N₃H₆) as the major product is/are

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The essential symmetry(ies) for a monoclinic crystal system is/are the presence of

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one C₃ axis

one C₂ axis

one C₄ axis

one C₆ axis

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Compound(s) that show(s) an intense peak at m/z 120 in the EI mass spectrum is/are

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Diagram for Chemistry question 24 (figure 2)

Diagram for Chemistry question 24 (figure 3)

Diagram for Chemistry question 24 (figure 4)

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The correct option(s) of reagents and reaction sequences suitable for carrying out the following transformation is/are

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(i) NBS, (PhCOO)₂; (ii) aq. NaOH; (iii) active MnO₂; (iv) Li/liq. NH₃, t-BuOH

(i) m-CPBA; (ii) BF₃·Et₂O

(i) SeO₂; (ii) Dess-Martin periodinane; (iii) K[ BH(s-Bu)₃] (K-selectride)

(i) dil. KMnO₄; (ii) NaIO₄

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