Physical Chemistry MCQ - Biotechnology Engineering (BT) MCQ

The value AH of the reaction.
CH₂Cl₂(g) → C(g)+2H(g) + 2Cl(g)
The average bond energies of C-H and C-Cl bonds are 416 and 328 kJ mol respectively

Certain mass of a gas occupy 200 mL at 127°C. If the gas is cooled to -73°C at constant pressure, its new volume is

The ratio of the radius of second orbit of Li²⁺ ion with the radius of third orbit of He⁺ ion is

For a reaction. 2A +  B → 3Z if the rate consumption of A is 2 x 10^-4 mol dm^-3 s^-1. The rate of formation of Z (in mol dm^-3 s^-1) will be

The ionic strength of a solution containing 0.008 M AlCl₃ and 0.005 M KCl is

The uncertainty in measuring the position of a proton is 2 x 10^-6 m. The minimum uncertainty in measuring the speed of this proton is (mass of proton is 1.672 x 10^-27 kg)

The vapour pressure of liquid decane is 10 torr at 55.7°C and 400 torr at 150.6°C. The value of ΔH_v is

The collect statement in the following is/are

(1) the correct expression for Schrodinger’s equation is 
(2) Bohr's quantisation condition is mvr = nh/2π
(3) The de-Broglie wavelength of an electron revolving in the second orbit of hydrogen atom is 6.649 x 10^-10m
(4) Radius of n^th orbit

Among the following the reaction that is accompanied by a increase in the entropy is

The conect equation is

For an ideal gas incorrect expresion is

Which of the following statements about catalyst is correct
(1) A catalyst increase the rate of a reaction without being destroyed
(2) A catalyst does not change the position of equilibrium
(3) A catalyst increase the rate of both forward and backward reactions
(4) A catalyst speeds up a reaction without taking pait in reaction

The collect statement is are
(1) Debye-Huckel Onsagar equation is
(2) The unit of specific resistance is Ω^-1m^-1s
(3) The ionic strength of 0.15 molal KCl solution is 0.15
(4) The unit of equivalent conductance

The circumference of the second orbit of an atom or ion having single electron is 4 x 10^-9 m. The de-Broglie wavelength of electron revolving in this orbit is ____10^-9 m

The half life of a first order reaction is 12.6 h. The time at which the concentration of reactants becomes 0.001 M from 1.0 M is _____ h.

Two moles of an ideal gas are compressed isothermally (100°C) and reversibly from a pressure of 10 atm to 25 atm. The value of free energy is ______

A current of 0.5 A is passed through molten AlCl₃ for 40 min the mass of aluminium deposited at the cathode is _____ g (Al = 27)

The pH of a neutral solution at 37°C, where k_ω equals 2.5 x 10^-14 is  ______

For an enzyme substrate reaction a plot between  yields a slope ot 40s. It the enzyme concentration is 2.5 μM. Then the catalytic efficiency of the enzyme is 10^x L mol^-1s^-1. The value of x is _____