Question # 1

Hydrogen atom spectrum does not lie in

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Ultraviolet region

Visible region

Infrared region

X ray region

The X-rays diffraction with crystal was first studied by

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W.H Bragg

W.L. Bragg

Michelson

None of these

Production of x rays is reverse process of

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Photo electric effect

Compton effect

An nihilation

Pair production

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV

1 rem =

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0.001 SV

0.01 SV

0.1 SV

1.01 SV

When an electron in an atom goes from a lower to higher orbit its:

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K.E increases , P.E decreases

K.E increases , P.E increases

K.E decreases , P.E increases

K.E decreases , P.E decreases

Paschen series lies in the

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Far ultraviolet region

Visible region

Ultraviolet region

Inferred region

Which of the following series of hydrogen spectrum lies in ultra violet region.

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Lyman sereis

Paschen series

Balmar series

Bracket series

In according with Bohr's theory the K.E of the electron is equal to:

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ke²/2r

Ze²/r

Ze²/r²

Ze²/2r²

Laser can be made by creating.

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Meta stable

Population inversion

Excited state

All of these

Photons emitted in inner shell transition are.

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Continuous X -rays

Discontinuous X rays

Characteristic X rays

Energetic X rays

The process by which lesser beam can be used to generate 3-dimensional images of objects is called

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Holography

Geo graphy

Tomography

Radio graphy

Laser is a device which can produce:

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Intense beam of light

Coherant beam of light

Monochromatic beam of light

All of the above

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

Boher proposed his atomic model in:

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1910

1911

1912

1913

Which of the following is one of the spectral series of atomic hydrogen?

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Brockett series

Balmer series

P fund series

All of above

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

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Infinite energy

Maximum energy

Minimum energy

Zero energy

_____ has the largest de Broglie wavelength at same speed.

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Proton

Alpha particle

Carbon atom

Electron

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