Question # 1

Angle of deflection of cathode rays was studied by

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Hittorff

Stoney

J. J. Thomson

J. Perrin

The correct set of quantum number for the unpaired electron of Cl - atom is

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2, 0, 2, +1/2

2, 1, -1, +1/2

3, 1, -1, +1/2

None of these

Which of these compounds on complete of one mole will release the greatest amount of energy?

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CH₃CH₂ CH₂ OH

CH₃CH₂ CH₃

CH₃ CH₂CO₂H

CH₃COCH₃

Which atomic orbital has lowest energy?

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7s

6p

5d

4f

Four containers holds the following quantity at the same temperature which one has the highest heat capacity?

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4 kg H₂O

3 kg H₂ O

2 kg H₂ O

1 kg H₂ O

A numerical value that described about the number of orientation in a sub-shell is

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Principle quantum number

Azimuthal quantum number

Spin quantum number

Magnitic quantum number

Maximum number of electrons can accommodate in N shell

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2

8

18

32

Alpha rays consist of:

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Neutrons

Helium Nucleus

Protons

Hydrogen Nucleus

Chlorine atom has set of n, l, m quantum number for the nupaired electrons

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2, 1, 1

3, 1, 1

2, 1, 0

3, 0, 0

Which of the following is not correct?

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Dissolution of NH₄CI in excess of water is an endothermic process

Neutralisation is always exothermic

The absolute value of enthalpy (H) can be determined experimentally.

The heat of reaction at constant volume is denoted by ΔE.

Choose the ionic specie which has more electrons than neutrons

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Na⁺

Mg²⁺

O^2-

Na^-

The nit heat change in a chemical reaction is same whether it is brought about in tow or ,ore different ways in one or several steps .it is known as:

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Henry,s law

Hess,s law

joule,s principal

law of conservation of energy

The value of R (Rydberg's constant) is _____________ m^-1

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1.0974 x 10⁷

1.0842 x 10⁷

1.082 x 10^-7

Both a and b

The set of orbitals having n + l = 5 are

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2p, 3d, 3s

3s, 4p, 4d

3p, 3d, 5s

5s, 4p, 3d

One mole of a an ideal gas expands isothermally to ten times its original volume.The change in entropy is

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0.1 R

2.303 R

10.0 R

100.0 R

If aufbau rule is not followed, 19th electron in Sc (Z = 21 ) will have

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n = 3, l = 0

n = 3, l = 1

n = 3, l = 2

n = 4, l = 0

A spontaneous change means:

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a lowering of free energy

a lowering of energy

an increase in internal energy

no energy change

The amount of energy released when an electron is added to an atom in the gaseous state is called

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ionization energy

electron affinity

electronegativity

bond energy

No cathode rays are produced in the discharge tube when gas is under ordinary pressure even if voltage of 5000 to 10000 is applied. The reason is

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voltage is low

discharge tube is not coloured

gas does not conduct current under ordinary pressure

temperature low

As the quantum number n increases, the energy difference between adjacent energy level.

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Decreases

Increases

Remains fluctuating

Remains same

All of the following are state function except:

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V

q

H

P

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