GATE XL 2025 Paper 1 — page 7

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2025 Paper 1

Complete GATE XL 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 19–21 of 122. Imported answers require review unless explicitly marked reviewed.

Paper practice 122 questionsPage 7 of 41

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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For product formation from only one type of reactant (e.g. A → product), the CORRECT match for the order of the reaction (given in Column I) with the half-life expression (given in Column II) is

([A]₀ is the initial concentration and kᵣ is the rate constant)

Column I: Order	Column II: Half-life expression
i. Zero	P. ln 2 / kᵣ
ii. First	Q. [A]₀ / 2kᵣ
iii. Second	R. 1 / kᵣ[A]₀
	S. 2kᵣ / [A]₀

Your answerChoose one option.

i–R, ii–P, iii–S

i–Q, ii–P, iii–R

i–S, ii–R, iii–Q

i–Q, ii–P, iii–S

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2025 · Paper 1

Question 19

Question 20

Question 21