Question # 1

The phase rule was deduced by

Choose an answer

Gibbs

Thomson

Troution

Henry

Which of the following molecules have centre of symmetry.

Choose an answer

H2O

HCl

CO2

H2SO4

Which of the following statement is not true with respect to photo chemical reactions.

Choose an answer

These take place in the presence of light

Free energy of these reactions may be positive or negative

Light intensity affect these reactions

Temperature has significant affect n rate of these reactions

The oxidation Number of I in HIO4 is.

Choose an answer

+6

+ 7

+ 3

+ 14

The glow of the yellow phosphorous as a result of slow oxidation in air is called.

Choose an answer

Chemiluminescene

Luminescence

Biolumineacence

Photolysis

If for a solution of an electrolyte. It is the transport number of the cation, then the transport number of the anion I, is equal to

Choose an answer

t/2

1 - t+

1 + t+

(i -t) /2

The entropy of the universe

Choose an answer

Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.

Choose an answer

CH3COOH

NH+4

H2SO-3

H4P2O7

The temperature of which the compound melts into a liquid to the same composition as the solid is called the

Choose an answer

Congruent melting point

Incongruent melting point

Peritectic temperatures

Metastable point

Which law of thermodynamics helps in calculating the absolute entropies of varies substances.

Choose an answer

Zeroth law

1st law

Second law

Third Law

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 kinetics of the decomposition of ammonia on the tungsten surface follows

Choose an answer

Zero order

First order

Second order

Third order

For assciated liquids, the value of d/M n x 10⁸ should be (where d is the density, M is the molar mass and n is the coefficient of viscosity)

Choose an answer

Zero

Infinte

Higher than 70

Less than 70

Visible light is just a portion of radiation emitted by atoms.Which of the following statements is not related with visible light.

Choose an answer

visible light is electromagnetic in nature.

It travels with the speed of light

It is a mass

The wave number of light is directly proportional to its wave length.

The azimuth or angular quantum number (i) determines the number of sob shells in a given shall. the allowed values of l for a given value ffor n are.

Choose an answer

1.2.3.......................

1,2,3 ..................(n-1)

0.1.2.3................(n-1)

2,4,6,..............(n-2)

Which of the following statements is not correct regarding the structure of DNA.

Choose an answer

It has a double helix structure.

There are hydrogen bonds in its structure

Unlike RNA there is no fixed ratio of bases in DNA

The code for protein synthesis is given by the sequence of bases in DNA

Wlhich of the following can act as a protective colloid

Choose an answer

Gelatin

Silica gel

Oil in water emulsion

All three

The reverse of photo chemical reaction is called.

Choose an answer

Phosphorescence

Chemiluminescence

Fluorescence

Photscnaitization

The particle would be stationary in a lattice only at.

Choose an answer

273 K

0 K

298 K

373 K

The relative lowering of vapour pressure of a solution on the addition of non -volatile solute.

Choose an answer

Is equal to the mole fraction of solute

Is equal to the sum of the mole fraction of the solute and solvent

Depends upon the nature of the solute

Depends upon the mole fraction of the solvent

Which of the following statement is not correct regarding the constant R . and in ideal gas equation PV= nRT

Choose an answer

Its value in independent of temperature

Its value is independent of pressure

In SI Units its value is 8.314 K^-1 mol^-1

It is called the universal gas constant per molecule.

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