Question # 1

The degenerate orbitals p-sub shell are

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2

3

5

7

For a system in equilibrium,Δ G = 0, under conditions of constant

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Temperature and pressure

Temperature and volume

Pressure and volume

Energy and volume

Positive rays produce in discharge tube from

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Electricity

Gas molecule

Anode

Cathode

The velocity of photon is:

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Independent of its wavelength.

Depends on its wavelength.

Equal to square of its amplitude.

Depends on its source.

The ΔH values for reaction C + 1/2 O₂ → CO and CO + 1/2 O₂ → CO₂ are 100 and 200 kJ respectively.The heat of reaction for C + O₂ → CO₂ will be

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50 kJ

100 kJ

150 kJ

300 kJ

The energy required to break 1 mole of bonds of from neutral atom is:

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bond energy

bond strength

bonds length

nine of all

An electron moving in orbit having principle quantum number 4 & azimuthal quantum 2, then subshell will be

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4p

4d

4f

5s

Pressure in gas discharge tube to discover electrons was kept

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10 torr

1 torr

0.1 torr

0.01 torr

In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because

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the radiations emitted in emission spectrum are absorbed in absorption spectrum

atomic emission spectrum is continuous

atomic absorption spectrum is continuous

distance between the lines increases

All the naturally occurring processes proceed spontaneously in a direction which lead to

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Decrease of entropy

Increases of enthalpy

Increase of free energy

Decrease of free energy

For a spontaneous process

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ΔG>0

ΔG<0

ΔG=0

None of these

Which orbital has lowest energy?

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3d

4s

3p

4f

Charge on the electron was measure by

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R.A. Milikan

J. J. Thomson

Rutherford

Faraday

Milikan determined the charge on electron in oil drop experiment. It value is

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6.625 x 10^-34C

1.602 x 10²³C

1.602 x 10^-23C

1.602 x 10^-19C

Orbitals having same energy are called

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hybrid orbitals

valence orbitals

degenerate orbitals

d-orbitals

The charge of an electron is determined by

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J.J Thomson

Crooks

Perrin

R.A Millikan

A reaction in which heat is given out is:

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a thermochemicla reaction

an exothermic reaction

an endothermic reaction

am energetic reaction

According to the Aufbau principle the electrons and added first to the orbital:

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In sub-levels of zero energy

In sub-levels of highest energy

In sub-levels oflowest energy

of no shell

Bohr's model of atom explains spectrum of:

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H like species only

H atom only

H and H like species

None of aove

The mass of electron is

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1.602 x 10^-10kg

1.6022 x 10^-19kg

9.1090 x 10^-31kg

None

Bohr model of atom is contradicted by:

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Planck's quantum theory.

Pauli's exclusion theory.

Heisenberg's uncertainty principle.

All of above.

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