GATE CY year:2017 PYQs & Answers — Page 4

Questions 31–40 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 4 of 7

The dissociative chemisorption of X

(g) on a metal surface follows Langmuir adsorption isotherm. The ratio of the rate constants of the adsorption and desorption processes is 4.0 atm

. The fractional surface coverage of X(adsorbed) at 1.0 atm pressure is __________ (up to two decimal places)

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The ionic activity coefficients of Ca

and F

are 0.72 and 0.28, respectively. The mean activity coefficient of CaF

is __________ (up to two decimal places)

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The angle of orientation (in degrees) of the angular momentum vector with respect to z-axis for

and

state of H-atom is __________ (up to two decimal places)

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The Gibbs free energy of mixing is denoted as

. 1.0 mole of He, 3.0 moles of Ne and 2.0 moles of Ar are mixed at the same pressure and temperature. Assuming ideal gas behavior, the value of

is ______ (up to two decimal places)

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represents a normalized molecular orbital constructed from two different atomic orbitals

and

that form an orthonormal set. The value of

is ______ (up to two decimal places)

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In cyclophosphazenes,

(X = F, Cl, Br and Me), the strength of P–N

-bond varies with X in the order

Your answerChoose one option.

F > Cl > Br > Me

Me > F > Cl > Br

Br > Cl > F > Me

Me > Br > Cl > F

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The structure type and shape of the polyhedral (skeletal) framework of the carborane,

, respectively, are

Your answerChoose one option.

ido and dodecahedron

closo and icosahedron

nido and icosahedron

closo and dodecahedron

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is the octahedral splitting energy and P is the electron pairing energy, then the crystal-field stabilization energy (CFE) of

Your answerChoose one option.

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The rates of substitution for the following reaction vary with L in the order

[Pt complex: Et₃P and Cl ligands in hashed wedges; L and PEt₃ ligands in solid wedges] + py → [Pt complex: Et₃P and py ligands in hashed wedges; L and PEt₃ ligands in solid wedges]⁺ + Cl⁻

L = CH₃⁻, Cl⁻, Ph⁻ and H⁻

Your answerChoose one option.

CH₃⁻ > Cl⁻ > Ph⁻ > H⁻

Cl⁻ > Ph⁻ > H⁻ > CH₃⁻

Ph⁻ > CH₃⁻ > H⁻ > Cl⁻

H⁻ > CH₃⁻ > Ph⁻ > Cl⁻

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The product formed in the reaction of

with

Your answerChoose one option.

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GATE CY year:2017 PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40