Question # 1

When a concentrated solute of an electrolyte is diluted.

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Its specific conductance increases

Its equivalent conductance decreases

The specific conductance decreases and equivalent conductance increases

Both specific and equivalent conductance increase

Which of the following statement is not related to BVT

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individual orbitals lose their indention

VBT uses the concept of resonance

VBT does not explain the paramanhetic nature of molecule

it uses only valence electron

Which of the following expression is correct.

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C = n/RT

C = RT/n

RT = Cn

Cn = 1/RT

A gas obeying the van Waals equation will closely resemble and ideal gas if

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The parameters 'a' and 'b' are small

'a' is small but 'b' is large

'a' is large but 'b' is mall

None of the above

The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.

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l,l- l........-1

l........2, l -3.......-2l

l-l-2,..........-l

l-2,l-4, ............-4l

The oxidation Number of I in HIO4 is.

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+6

+ 7

+ 3

+ 14

The reverse of photo chemical reaction is called.

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Phosphorescence

Chemiluminescence

Fluorescence

Photscnaitization

Which of the following is not a colligative property.

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Elevation of B.P.

Depresaion in F.P

Viscosity

Osmotic pressure

The SI unit of pressure is Pascal it is define da sa force per unit are of 1N/m2 one atmosphere of pressure is equal to.

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760 mm of Hg

1 bar

101 k Pa

760 torr

All are correct

Which of the following solids is a better conductor of electricity.

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Pore NaCl cyrstal

Diamond

Graphite

Marble pieces

In an isochoric process

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Energy remains constant

Volume remains constant

Pressure remains constant

Temperature remains constant

The number of vibrational degree of freedom for CO2 is

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2

3

4

5

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

The pH of water 7 at 25 ^oC if water is heated to 70^oC . Which of the following should be true.

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pH will decrees

pH will increase

pH will remain constant

None of these

The kinetics of the decomposition of ammonia on the tungsten surface follows

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Zero order

First order

Second order

Third order

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

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Temperature rises

Pressure rises

W=0

Q = 0

The gases H2, N2, O2 and NH3 . H2 =2 , N2 = 28, O2 = 32 and NH3 =17 will effuse in the order.

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H2> N2> O2 > NH3

NH3 >O2 > N2 > H2

H2 > N2 > NH3 > O2

H2 >NH3 > N2 > O2

Which of the following statements is not correct regarding electromagnetic spectra?

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The frequency of microwave is less than uv

The velocity of X-rays is more than uv

Cosmic rays have shorter wave length than radio waves.

The frequency of uv is greater than visible rays.

The Langmuir adsorption iso therrn shows that the amount of adsorbed gas per gram of the solid is equal to.

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ap/1+bp

ap+1/1-bp

1+ap/1-bp

a(1+bp)

All naturally occurring processes spontaneously in a direction leads to.

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Decrease of entropy

Increase of entropy

Decrease in free energy

Increase in free energy

A system is said to be in the colloidal state if the particle size of the dispersed phase ranges from

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_o

I to 10 A

10 to 10000 A

10 to 100 A

1000 to 10000 A

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