GATE CY format:msq PYQs & Answers — Page 8

Questions 71–80 of 90. Imported answers require independent review unless marked reviewed.

Topic practice 90 questionsPage 8 of 9

Two different enzyme catalysis reactions I and II have identical Y-intercepts for the Lineweaver-Burke (equation given below) plots. The slope for reaction I is twice that of reaction II.

If the initial concentrations of enzymes in I and II are same, the correct statement(s) is(are)

where

and

are rate and maximum rate;

is Michaelis-Menten constant, and [S] is substrate concentration.

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Reactions I and II have same turn over number

Michaelis-Menten constants for reactions I and II are identical

Michaelis-Menten constant for reaction I is twice that of reaction II

The rates of the elementary steps for reactions I and II are identical

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The CORRECT reagent(s) for the given reaction is(are)

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, NaOH

Diagram for Chemistry question 26 (figure 2)

DIBAL-H, then mCPBA

·pyridine, Me

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The CORRECT statement(s) about the

H NMR spectra of compounds P and Q is(are)

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P shows a sharp singlet at

ppm (for H

and H

)

Q shows a sharp singlet at

ppm (for H

and H

)

P shows an AB-quartet centered at

ppm (for H

and H

)

Q shows an AB-quartet centered at

ppm (for H

and H

)

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The CORRECT statement(s) about thallium halides is(are)

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TlF is highly soluble in water whereas other Tl-halides are sparingly soluble

TlF adopts a distorted NaCl structure

TlI

is isomorphic with CsI

and the oxidation state of Tl is +3

Both TlBr and TlCl have CsCl structure

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The CORRECT statement(s) about the spectral line broadening in atomic spectra is(are)

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The collision between atoms causes broadening of the spectral line

Shorter the lifetime of the excited state, the broader is the line width

Doppler broadening is more pronounced as the flame temperature increases

In flame and plasma, the natural line broadening exceeds the collisional line broadening

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Match the CORRECT option(s) from column A with column B according to the metal centre present in the active site of metalloenzyme.

A		B
P	Cu	I	B -coenzyme
Q	Mo	II	Carboxypeptidase
R	Co	III	Nitrate reductase
S	Zn	IV	Cytochrome P-450
		V	Tyrosinase

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P-V, Q-III, R-I, S-II

P-IV, Q-II, R-I, S-III

P-II, Q-IV, R-V, S-III

P-V, Q-III, R-II, S-IV

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The CORRECT statement(s) about the following phase diagram for a hypothetical pure substance X is(are)

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The molar volume of solid X is less than the molar volume of liquid X

X does not have a normal boiling point

The melting point of X decreases with increase in pressure

On increasing the pressure of the gas isothermally, it is impossible to reach solid phase before reaching liquid phase

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The parameter(s) fixed for each system in canonical ensemble is(are)

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temperature

pressure

volume

composition

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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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GATE CY format:msq PYQs

Question 57

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 51

Question 52