Question # 1

De Broglie equation treats electron to be.

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A particle

Wave

Both particle and wave

None of these

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

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H

He

H+

Li+

Hund's rule state that when electrons enter to the same sub levels they are.

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Singly occupied with same spin

Doubly occupy with same spin

Singly occupied with different spin

Doubly occupied with different spin

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

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Red

Blue

Yellow

Green

Quantum number values for 2p orbitals are

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n = 2, l = 1

n =1, 1 = 2

n =1, l = 0

n = 2, l = 0

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.

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

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

Maximum number of electrons in f-subshell is.

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2

6

10

14

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

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

Positive rays were discovered by.

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J.J.Thomson

Goldstein

Ruther ford

William Crookes

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

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

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

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Helium

Oxygen

Nitrogen

Hydrogen

The electron in a subshell is filled according to formula.

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2n²

2(2l+1)

(2l+1)

None of these

X- rays have same nature as

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Alpha rays

Beta rays

Gamma rays

Cathods rays

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

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