Question # 1

X- rays have same nature as

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Alpha rays

Beta rays

Gamma rays

Cathods rays

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

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

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Red

Blue

Yellow

Green

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

Rutherford's model of atom failed because.

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The atom did not have a nucleus and electron

It did not account for the attraction between protons and neutrons.

It did not account for 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

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 the ground state of an atom the electron is present.

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In the nuclsus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

Node is a surface on which probability of finding electron is

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Zero

More than 95%

50%

Infinite

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

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

Orbitals having same energy are called.

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Hybrid orbitals

Valance orbitals

Degenerate orbitals

d- orbitals

Cathode rays cast shadow when an opaque object is placed in their path. This behavior of cathode rays show that.

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They move is straight line

They are negatively charge

They possess momentum

They are energetic

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

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

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

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

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Alpha

Gamma

Beta

Nil

Which one of the following relationship is correct about energy and frequency.

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E = hv

E = h/v

E = v/h

h = v/E

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