Question # 1

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

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Helium

Oxygen

Nitrogen

Hydrogen

How many electrons can be accommodated in sub shell for which n = 3, l = 1

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6

8

18

32

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

Node is a surface on which probability of finding electron is

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Zero

More than 95%

50%

Infinite

Anode rays were discovered by

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J. Stoney

Rutherford

J.J. Thomson

Goldstein

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

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

Quantum number values for 3p orbitals are.

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n = 0, l = 3

n = 3 , l = 1

n = 2, l = 1

n = 2 , l = 3

Which of the following particles would on losing an electron has its outermost p-orbital as half filled

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Nitrogen atom

O⁺ion

P^-1ion

S⁺¹ion

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

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

Maximum number of electrons in f-subshell is.

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2

6

10

14

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 one of the following orbital will be filled first.

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4f

5d

3d

4s

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1The wave length of this light is.

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500 nm

500 m

200 nm

600 m

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 Rutherford experiment of using a stream of alpha particles on a piece of gold foil proved that.

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The atom was a solid sphere

The atom had electron

The atom had neutrons

The atom had a great empty space in it

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