Question # 1

The nature of positive rays depends on

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The nature of electrode.

The nature of discharge tube

The nature of residual gas

All of the above

The e/m value for the positive rays in maximum for the gas.

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Helium

Oxygen

Nitrogen

Hydrogen

Rutherford's model fo atom failed because

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The atom did not have a nucleus and electrons.

It did not account for the attraction between protons and neutrons.

It did not account for the stability of the atom

Their is actually no space between the nucleus and the electrons.

The electron in a subshell is filled according to formula.

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2n²

2(2l+1)

(2l+1)

None of these

Spectrum produced due to the transition of electron from M-Shall to L-Shell is.

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Absorption

Emission

Continuous

X rays

Positive rays were discovered by.

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J.J.Thomson

Goldstein

Ruther ford

William Crookes

Lyman series lie in

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Ultraviolet region

Visible region

Infrared region

Radio waves region

Rutherford's model of atom failed because.

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The atom did not have a nucleus and electron

It did not account for the attraction between protons and neutrons.

It did not account for stability of the atom

There is actually no space between the nucleus and the electrons.

In discharge tube, properties of X-rays depend upon the nature of.

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Residual gas

Cathode plate

Anode plate

All of these

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

The velocity of photon is.

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Depends on its source

Equal to square of its amplitude

Depends on its wavelength

Independent of its wavelength

Which of the following wave properties is inversely proportional to the energy for electromagnetic radiations

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Frequency

Wave number

Velocity

Wave length

The atomis radius is of the order of

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10^-8cm

10⁸cm

10^-12cm

10^-10cm

The value of Rydberg constant is.

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1.6 x 10⁷ m-1

1.9768 x 10⁷ m-1

1.09678 x 10⁷ m-1

1.7904 x 10⁷ m-1

Quantum number value for 2p sub shell are

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n = 2, I = 1

n = 1, l =1

n = 1, l = 0

n = 2, l = 0

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

If uncertainty position of an electron is zero, the uncertainty in its momentum would be

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Zero

Infinite

Both a and b

None of these

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