GATE XL year:2025 PYQs & Answers — Page 2

Questions 11–20 of 122. Imported answers require independent review unless marked reviewed.

Topic practice 122 questionsPage 2 of 13

The rate of solvolysis for the following tertiary halides in 80% aqueous ethanol at 25 °C follows the order

Your answerChoose one option.

I < II < III

II < III < I

II < I < III

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The CORRECT order of boiling points for the hydrogen halides is

Your answerChoose one option.

HF > HI > HBr > HCl

HF > HCl > HBr > HI

HI > HBr > HCl > HF

HI > HF > HBr > HCl

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The bond order in

species is

Your answerChoose one option.

2.5

3.5

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The standard enthalpy of the reaction,

is found to be

and the

value for CO (g) is

. The value of

(in

) for H

O (g) is

(The standard enthalpies of formation of elements in their reference states are zero at all temperatures)

Your answerChoose one option.

+241.8

0.0

−241.8

+20.8

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The temperature dependence of reaction rates is generally given by the Arrhenius equation. A plot of

against

is a straight line from which the pre-exponential factor ‘A’ and the activation energy ‘

’ can be determined.

The CORRECT option regarding this plot is

Your answerChoose one option.

Slope:

; Intercept on the y-axis:

Slope:

; Intercept on the y-axis: A

Slope:

; Intercept on the y-axis: A

Slope:

; Intercept on the y-axis:

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The isothermal expansion of one mole of an ideal gas from

at temperature, T occurs in two ways.

Path I: a reversible isothermal expansion;

Path II: free expansion against zero external pressure

The CORRECT option for the values of

and

for Path I and Path II is

Your answerChoose one option.

Path I:

Path II:

Path I:

Path II:

Path I:

Path II:

Path I:

Path II:

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The CORRECT statement(s) regarding the given molecules is(are)

Your answerSelect all correct options. You can choose more than one.

Both I and II are achiral molecules.

Both II and III are chiral molecules.

IV is a chiral molecule.

Both II and IV are chiral molecules.

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The CORRECT statement(s) about [Ni(CN)₄]²⁻, [Ni(CO)₄] and [NiCl₄]²⁻ is(are) (Given: Atomic number of Ni: 28)

Your answerSelect all correct options. You can choose more than one.

Both [Ni(CN)₄]²⁻ and [Ni(CO)₄] are square planar complexes.

[Ni(CN)₄]²⁻ is diamagnetic and [NiCl₄]²⁻ is paramagnetic.

Both [Ni(CO)₄] and [NiCl₄]²⁻ are paramagnetic.

[Ni(CN)₄]²⁻ is square planar and [NiCl₄]²⁻ is tetrahedral in shape.

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Consider the two

values of valine as 2.32 and 9.62. The isoelectric point (pI) of this amino acid is _____. (rounded off to two decimal places)

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A few species are given in Column I. Column II contains the hybrid orbitals used by the central atom of the species for bonding.

The CORRECT match for the species to their central atom hybridization is

(Given: Atomic numbers of B: 5; C: 6; O: 8; F: 9; P: 15; Cl: 17; I: 53)

Column I — Species: i. I₃⁻; ii. PCl₃; iii. BF₃; iv. CO₂

Column II — Hybrid orbitals used by the central atom for bonding: a. sp; b. sp²; c. sp³; d. sp³d

Your answerChoose one option.

i–d, ii–c, iii–b, iv–a

i–a, ii–d, iii–b, iv–c

i–d, ii–c, iii–a, iv–b

i–d, ii–b, iii–c, iv–a

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GATE XL year:2025 PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20