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Minor Test - Physical Chemistry - Chemistry MCQ


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30 Questions MCQ Test - Minor Test - Physical Chemistry

Minor Test - Physical Chemistry for Chemistry 2024 is part of Chemistry preparation. The Minor Test - Physical Chemistry questions and answers have been prepared according to the Chemistry exam syllabus.The Minor Test - Physical Chemistry MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Minor Test - Physical Chemistry below.
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Minor Test - Physical Chemistry - Question 1

The normal mode of ethylene represented by the figure below is

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Symmetric stretching mode ⇒ no change in dipole moment ⇒ IR inactive
Permanent dipole moment of ethylene =0 ⇒ microwave inactive ⇒ Raman active

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Minor Test - Physical Chemistry - Question 2

 

The spacing between two adjacent lines of the  Raman rotational spectrum of H35Cl is 8.04 x 1011Hz given that bond length D35Cl is 10% greater than that of H35Cl. The corresponding spacing for D35Cl is ____ x  1011Hz. (Upto two decimal places)


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Minor Test - Physical Chemistry - Question 3

The correct partition function for ortho hydrogen is 

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Symmetric in nuclear spin antisymmetric (odd) in rotational quantum number. To maintain antisymmetry of the total wavefunction rotation must be antisymmetric as nuclear wave function is already symmetric for ortho H2.

Minor Test - Physical Chemistry - Question 4

If temperature is tripled and mass of the gaseous molecule is one forth. The rms speed of the molecular will be change by a factor

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Minor Test - Physical Chemistry - Question 5

The relative population of the state of a two-level system, non-degenerate to triply degenerate at infinite temperature is

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Minor Test - Physical Chemistry - Question 6

Suppose ψ1, ψ2, ψ3..... are wave functions of an anharmonic oscillator and ø0, ø1, ø2, ø3 ...... are wave functions of a harmonic oscillator with increasing order of energy. The subscript denote vibrational quantum numbers in both the cases.

The forbidden electric dipole(assuming the dipole operator is linear in normal co-ordinates) transition among the following is

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Minor Test - Physical Chemistry - Question 7

The number of degenerate spatial orbitals with spin of a hydrogen like atom with principal quantum number n = 8 is____


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Minor Test - Physical Chemistry - Question 8

In the structure of an ionic solid AB. The cations A are present at body centre and at all Oh vds while anions B present in FCC lattice. The molecular formula of the solid is

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Minor Test - Physical Chemistry - Question 9

If ψnlm denotes eigen function of  then expectation value of  in state 

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For a spherically  symmetric potential eigenstates of  will be eigenstates of  also.


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Minor Test - Physical Chemistry - Question 10

The number of C2-axis present in a cubic crystal is ______


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The Total number C2 in cubic crystal is 6 which passes through opposite edge centre.

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Minor Test - Physical Chemistry - Question 11

 

On the basis of salt effect, a plot between log(k/K0) vs √1 having slope is equal to -2.1 for the following reaction

The value of Z+ is ____ (Round off to nearest integer)


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Minor Test - Physical Chemistry - Question 12

The correct statement in the following is/are
(1) A molecule is chiral if it does not have an Sn axis.
(2) All chiral molecules are polar
(3) H-C ≡ C-Na having  point group

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Minor Test - Physical Chemistry - Question 13

The point group of the alphabet

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Minor Test - Physical Chemistry - Question 14

A cup of water at 278K (the system) is placed in a microwave oven and the oven is turned on for one minute during which some of the liquid is vapourized. Which of q,w and ΔU are

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q = positive (Because heat flow across the system-surrounding boundary into the system)
w = negative ( Since, vaporizing water does work on the surrounding)
ΔU = positive (Temperature increase and some of the liquid is vapourized)

Minor Test - Physical Chemistry - Question 15

 using this equation to evaluate CP-CV for an ideal gas?

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∴ 

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Minor Test - Physical Chemistry - Question 16

For an enzyme-substrate system obeying the simple Michaelis-Meten mechanism, the rate of product formation when the substrate concentration is very large, has the limiting value 0.02 moldm-3 . At a substrate concentration of 250 mg/dm3, the rate is half this value. The value of k1/k-1 is _______ x 10-3 dm3mg-1. [Assuming that k2<<k-1](answer should be an integer).


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Minor Test - Physical Chemistry - Question 17

The kC for the reaction is ____ x 10-24.

For which kp = 3.5 x 10-23 atm at 270C? ( Round off to two decimal places).


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Minor Test - Physical Chemistry - Question 18

 

The degree of dissociation of Br2(g) into Br(g) if at 600K and a total pressure is 0.1 atm is ____(therefore, kP = 0.255atm). (Round off to two decimal places).


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Minor Test - Physical Chemistry - Question 19

Which of the following expression are not true?

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Minor Test - Physical Chemistry - Question 20

Determine the value of E0 for the given cell reaction is ____ V.

From the one electron's reduction potential for Cr3+ and the three-electrons reduction potential for Cr3+?
 (Round off to two decimal places).


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Minor Test - Physical Chemistry - Question 21

Two β-particles having speeds α1 and α2 have kinetic energies 2 and 8 MeV, respectively. The relationship between α1 and α2 is

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Minor Test - Physical Chemistry - Question 22

For distinguishable molecules are distributed in energy level E1 and E2 with degneracy 4 and 5 respectively. The number of microstates with three molecules in energy level E1 and two in energy levels E2 is ____ (answer should be an integer).


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Minor Test - Physical Chemistry - Question 23

If f(v) is the Maxwell Boltzmann distribution for speed v. The ratio of f(vP) and f (vrms) is

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Minor Test - Physical Chemistry - Question 24

If the edge length of a DCC unit cell is 1.414 Then the radius of the particle is _____  (upto three decimal places)


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Minor Test - Physical Chemistry - Question 25

An atom (having molar mass 42 amu) crystallises in a BCC cell of edge length 2.1 pm. The density of the crystal is (in gcm-3) _____ x 107. (Round off to one decimal place).


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Minor Test - Physical Chemistry - Question 26

Assuming harmonic approximation. The energy change for the reaction, HBr + D→ HBr + HD in cm-1 is (the zero point energy data in cm-1 is given in the table below)

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Minor Test - Physical Chemistry - Question 27

The transition moment integral for rotational transition between J = 0 MJ = 0 and j = 1 : MJ = 0 states for a diatomic molecule along the z-axis is proportional to 

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Minor Test - Physical Chemistry - Question 28

A system has triply degenerate ground state with energy E0 and very large number of spaced states if T → 0. Then partition function is _____(answer should be an integer)


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Minor Test - Physical Chemistry - Question 29

A molecule normally absorbs in the green wavelength (500nm). At some temperature, It is measured that for every 10 molecules in the excited state. There are about 27 molecules in the ground state. The approximate temperature of the molecules is _____ x 104 K. (Round off to nearest integer).


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Minor Test - Physical Chemistry - Question 30

 

The single particle partition function  (f) for a certain system has the form f = CezT2 . The average energy per particle will be

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