Question # 1

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

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Absorption

Emission

Continuous

X rays

Node is a surface on which probability of finding electron is

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Zero

More than 95%

50%

Infinite

The mass of alpha particle is equal to.

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Four times the mass of one proton

That of one hydrogen atom

That of one electron

That of one proton

The line of the balmer series in the visible region of the spectrum, but the limiting line, in the series lies in

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Visible region

X-Ray region

I.R region

U.V. region

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

In the ground state of an atom, the electrons is present.

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest form the nucleus

Positive rays were discovered by.

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J.J.Thomson

Goldstein

Ruther ford

William Crookes

When atoms are subjected to strong electric field, splitting of spectral lines is called.

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Zeeman effect

stark effect

Photoelectric effect

Compton effect

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

Splitting of spectral lines when atoms are subjected to strong electric field is called.

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

Which one of the following has the same number of electrons as an alpha particle.

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H

He

H+

Li+

Bohr's model of atom, is contradicted by.

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Planck quantum theory

Pauli's exclusion prinsciple

Heisenberg's uncertainty principle

All of the above

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

Which electron traveled more distance, when jump from

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n1 to n2

n2 ato n3

n3 to n2

n3 to n4

The azimuthal quantum number / = 2, then M(Magnetic quantum number) can have values as

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+1, -1

+1, 0, -1

+2, +1, 0,1, -1, 2

+3, +2, +1, 0, 1, -2, -3

In which de excitation of electron of hydrogen atom maximum energy is relaeased.

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From n2 to n1

From n3 to n2

From na to n1

From na to n2

Bohr's model of atom is contradicted b y.

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Planck quantum theory

Quantization of energy of electrons

Heisenberg's uncertainty principle

Quantization of angular momentum

Which formula will be used to determine the number of in electrons sub shell of an atoms.

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2(l+1)

2(2l+1)

(l+1)

(2l+1)

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