GATE CY format:mcq PYQs & Answers — Page 26

Questions 251–260 of 394. Imported answers require independent review unless marked reviewed.

Topic practice 394 questionsPage 26 of 40

In the electronic absorption spectrum of an aqueous solution of [Ni(NH₃)₆]²⁺, a very weak band is observed between the bands due to the transitions ³A₂g → ³T₂g and ³A₂g → ³T₁g(F). The transition responsible for the very weak band is (Given: atomic number of Ni is 28)

Your answerChoose one option.

³A₂g → ¹T₁g

³A₂g → ¹T₂g

³A₂g → ¹E_g

³A₂g → ¹A₂g

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The experimental magnetic moment (3.4 BM) of a hydrated salt of Eu³⁺ at 27 °C is significantly different from the calculated value. The difference is due to (Given: atomic number of Eu is 63)

Your answerChoose one option.

population of electrons at higher J level(s) via thermal excitation.

strong ligand field splitting of f-orbitals.

strong spin-orbit coupling.

pairing of electrons in f-orbitals.

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The CORRECT combination of L1 and L2 among H⁻, NO⁻, MeCH²⁻ and CO, that will satisfy the 18 electron rule for both metal centers in the following neutral molecule, is:

(Given: atomic number of Ru is 44)

Your answerChoose one option.

H⁻, NO⁻

MeCH²⁻, NO⁻

MeCH²⁻, CO

H⁻, CO

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In the following reaction sequence,

the structure of B is (Given: atomic number of Mo is 42)

Your answerChoose one option.

Diagram for Chemistry question 37 (figure 2)

Diagram for Chemistry question 37 (figure 3)

Diagram for Chemistry question 37 (figure 4)

Diagram for Chemistry question 37 (figure 5)

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The following table lists the reaction/conversion catalyzed by metalloenzymes. The CORRECT combination is

Your answerChoose one option.

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

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

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

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

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The fission reaction of

with thermal neutron is represented below.

and

are the primary fission fragment pair, which undergo series of radioactive decay to form stable nuclei

and

(chain ends). The

and

, respectively are:

Your answerChoose one option.

and

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The CORRECT ‘voltage (E) versus time’ excitation signal used in cyclic voltammetry is

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Diagram for Chemistry question 40 (figure 2)

Diagram for Chemistry question 40 (figure 3)

Diagram for Chemistry question 40 (figure 4)

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The hydrogen-like radial wave function of the

orbital is given as

where

;

atomic number;

distance from the nucleus and

Bohr radius.

Positions of the radial nodes (in units of

) of the

orbital are at

Your answerChoose one option.

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and

for Fe(g) are 370.7 kJ mol

and 416.3 kJ mol

at 298 K, respectively. Assuming

is constant in the interval 250 K to 375 K,

(rounded off to the nearest integer) for Fe(g) at 375 K is:

Your answerChoose one option.

359 kJ mol

338 kJ mol

325 kJ mol

310 kJ mol

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Adsorption of N

on TiO

was carried out at 75 K. A plot of

versus

(

) gives a straight line with an intercept,

and slope,

. The volume (rounded off to the nearest integer) corresponding to the monolayer coverage is:

Your answerChoose one option.

996 mm

785 mm

690 mm

555 mm

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GATE CY format:mcq PYQs

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