Question # 1

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

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zero

Less than zero

Infinite

One

The electron in a subshell is filled according to formula.

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2n²

2(2l+1)

(2l+1)

None of these

The atomis radius is of the order of

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10^-8cm

10⁸cm

10^-12cm

10^-10cm

n+1 value of 6d orbital is.

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08

09

10

18

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

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Absorption

Emission

Continuous

X rays

An orbital which is spherical and symmetrical is

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S-Orbital

P - Orbital

d- Orbital

f - Orbital

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 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

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

De Broglie equation treats electron to be.

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A particle

Wave

Both particle and wave

None of these

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

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

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

Lyman series lie in

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Ultraviolet region

Visible region

Infrared region

Radio waves region

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

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500 nm

5000 nm

200 nm

5 x10⁷ m

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

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

When fast neutron carries nuclear reaction with nitrogen it ejects aprticles.

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Alpha

Gamma

Beta

Nil

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