Question # 1

Which of the following symmetry element leaves the molecule or an object unchanged.

Choose an answer

Proper rotation

Improper rotation

Inversion axis

Identity

In emulsions , the dispersed phase and the dispersion medium are.

Choose an answer

Both solids

Both liquids

Both gases

Phase is liquid and medium is solid.

Which of the following statement is not related with high quantum yield reasons.

Choose an answer

Formation of reactive intermediates which may act as catalyst

The active molecules may collide with other molecules and activates these molecules.

The reaction may be exothermic and heat evolve may activate other molecule

The primary photo chemical process may be reversed

The expression of specific conductance is given by

Choose an answer

Ls= I/R , l/A

Ls = L I/A

Ls = I/L , A/l

LS = r l/A

Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH

Choose an answer

12.5 mL of 0.1 M solution

24 mL OF 0.1 m Solution

50 mL of 0.1 M solution

None of the above

The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.

Choose an answer

2,2

3 , 2

1 , 1

1 , 2

Which of the following statements is not true with reference to ionic conductors.

Choose an answer

Ionic conductance is due to movement of the ions

It involves the transfer of matter

It involves oxidation reduction reactions

It decreases with rise in temperature.

The stabilization of the dispersed phase in a lyophobic sol is due to

Choose an answer

Liking for the dispersion medium

The surface tension of the medium

The formation of an electrical layer between the two phases

The viscosity of the medium

Sulphur can exist in

Choose an answer

One phase

Two phase

Three phase

Four phase

At constant temperature and pressure, the decrease in Gibbs free energy (F) in equal to

Choose an answer

Increase in entropy

Decrease in entropy

Reversible work done by the system

All types of work except the work of expansion

The enrichment of chemical substance at the surface of a solid is called

Choose an answer

Adsorption

Absorption

Sorption

Isotherm

Which of the following statements is not related with entropy.

Choose an answer

It is a measure of disorder

It is a measure of unavailable energy

It is a function of thermodynamics probability

It is a path function

Which of the following characteristics of adsorption is wrong.

Choose an answer

Adsorptoin on solids is reversible in nature

Adsorption, in general increase with increase in temperature.

Adsorption is generally selective in nature.

Both enthalpy and entropy of adsorption are negative

Which of the following system has low as well as upper consolute temperature.

Choose an answer

Nicotine - water

Aniline -water

Triethlylamine -water

Phenol -water

Which parameter of a chemical reaction will change with the use of a catalyst.

Choose an answer

Delta F, change in free energy

Delta S, change in entropy

Delta E , change in internal energy

K, the rate constant

Which of the following is always true for the adiabatic expansion of gas.

Choose an answer

Temperature rises

Pressure rises

W=0

Q = 0

Which substance has the greatest lattice energy.

Choose an answer

CuBr

MgO

KI

NaF

For a chemical reaction A ___________ produce, the rat of the reaction doubles when the concentration of A is increased by 4 times the order of the reaction is.

Choose an answer

0

1

1/2

4

The electronic configuration of chromium (Z =24) in the ground state is.

Choose an answer

[Ar] 4s² , 3d⁴

[Ar] 3d⁶

[Ar]4s¹, 3d⁵

[Ar]

Poise is a unit of.

Choose an answer

Refractive index

Optical activity

Fluidity

Viscosity

Solution with components which obeys Raoult's over the entire composition range are said to be.

Choose an answer

Real solution

Regular solutions

Dilute solutions

Ideal Solution

More Classes

Other Links

PPSC Chemistry Part I Physical Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer