Question # 1

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

Orbitals having same energy are called.

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Hybrid orbitals

Valance orbitals

Degenerate orbitals

d- orbitals

X- rays have same nature as

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Alpha rays

Beta rays

Gamma rays

Cathods rays

Which particle has a mass 1/1836 time, that of hydrogen.

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Proton

Positron

Electron

Neutron

Rutherford's model of 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

There is actually no space between the nucleus and the electrons

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 by

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Planck quantum theory

Quartization of energy of electrons

Heisenberg's uncertainty principle

Quartization of angular members

The charge on electron was determined by millikan in his oil drop experiment and its value is

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6.023 x 10^-23C

1.602 x 10^-23C

1.602 x 10^-19C

6.625 x 10^-34C

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

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Stark effect

Zeeman effect

Photoelectric effect

Compton effect

When 5d orbital is completed them entering electron goes into.

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6s

6p

6d

6f

Which of the following orbitals is not possible.

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3p

4s

2d

Is

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

Cathode rays strike alumina and produce a ..........colour.

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Red

Blue

Yellow

Green

Anode rays were discovered by

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J. Stoney

Rutherford

J.J. Thomson

Goldstein

Which is not decay product of free neutron

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Proton

Electron

Neutron

Antineutrino

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

Positive rays were discovered by.

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J.J.Thomson

Goldstein

Ruther ford

William Crookes

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