Minor Test - Physical Chemistry - Chemistry MCQ
30 Questions MCQ Test - Minor Test - Physical Chemistry
The normal mode of ethylene represented by the figure below is
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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The correct partition function for ortho hydrogen is
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
The relative population of the state of a two-level system, non-degenerate to triply degenerate at infinite temperature is
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
The number of degenerate spatial orbitals with spin of a hydrogen like atom with principal quantum number n = 8 is____
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
If ψnlm denotes eigen function of 
then expectation value of 
in state 
will be eigenstates of 
also.
The number of C2-axis present in a cubic crystal is ______
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)
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
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
using this equation to evaluate CP-CV for an ideal gas?
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).
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).
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).
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).
Two β-particles having speeds α1 and α2 have kinetic energies 2 and 8 MeV, respectively. The relationship between α1 and α2 is
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).
If f(v) is the Maxwell Boltzmann distribution for speed v. The ratio of f(vP) and f (vrms) is
If the edge length of a DCC unit cell is 1.414
Then the radius of the particle is _____ 
(upto three decimal places)
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).
Assuming harmonic approximation. The energy change for the reaction, HBr + D2 → HBr + HD in cm-1 is (the zero point energy data in cm-1 is given in the table below)
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
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)
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).
The single particle partition function (f) for a certain system has the form f = CV ezT2 . The average energy per particle will be
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