GATE XL branch:xl PYQs & Answers — Page 63

Questions 621–630 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 63 of 124

The geometry of Fe(CO)

is (Given: Atomic number of Fe = 26)

Your answerChoose one option.

pentagonal planar

square pyramidal

trigonal bipyramidal

trigonal pyramidal

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The structure of the major product Q of the following reaction is

Your answerChoose one option.

Diagram for Life Sciences question 2 (figure 2)

Diagram for Life Sciences question 2 (figure 3)

Diagram for Life Sciences question 2 (figure 4)

Diagram for Life Sciences question 2 (figure 5)

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The time taken by a first order reaction to reach 90% completion is 20 s. The time taken for the reaction to reach 50% completion is ______ s (rounded off to the closest integer).

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The ground state energy of an electron in a hydrogen atom is −13.60 eV. The energy of the electron in the third excited state is ______ eV (rounded off to two decimal places).

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A solution of a compound shows an absorbance of 0.42 at 275 nm in a cuvette with 0.1 dm light path. The molar absorptivity of the compound is

. The concentration of the compound is ______ × 10

M (rounded off to the closest integer).

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The CORRECT order of acidity of the following compounds is

Your answerChoose one option.

II > I > III

II > III > I

III > II > I

III > I > II

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The O–O bond order in

species is

Your answerChoose one option.

0.5

1.0

1.5

2.0

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For a reaction,

Group I contains three plots of reactant concentrations as functions of time, where

= concentration of reactant X at time

;

= concentration of reactant X at initial time,

. Group II gives a list of different orders of reaction. Match the plots with the order of the reaction.

Group I:

Group II: (1) Zero order; (2) First order; (3) Second order.

Your answerChoose one option.

(P) – (1), (Q) – (2), (R) – (3)

(P) – (3), (Q) – (2), (R) – (1)

(P) – (2), (Q) – (3), (R) – (1)

(P) – (2), (Q) – (1), (R) – (3)

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The structure of the major product S of the following reaction is

Your answerChoose one option.

Diagram for Life Sciences question 9 (figure 2)

Diagram for Life Sciences question 9 (figure 3)

Diagram for Life Sciences question 9 (figure 4)

Diagram for Life Sciences question 9 (figure 5)

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The CORRECT combination(s) of Y and T for the following elimination reaction is(are)

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

Y = NMe₃⁺ and T = Me–CH=CH–Me

Y = NMe₃⁺ and T = Me–CH₂–CH=CH₂

Y = Br and T = Me–CH₂–CH=CH₂

Y = Br and T = Me–CH=CH–Me

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GATE XL branch:xl PYQs

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10