Generate Quiz 6A3186E9F169A

1 / 10

For gaining an atomic spectra, an evacuated glass tube is filled with:

Elimination Tool

A) Neon

B) Hydrogen

C) Carbon dioxide

D) Sulphur dioxide

2 / 10

When white light is passed through cool gases, the spectra we observe is called _____.

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A) Line spectra

B) Continuous spectra

C) Absorption line spectra

D) Emission line spectra

3 / 10

Electrons are emitted in the production of X-rays by:

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A) Conduction

B) Convection

C) Thermionic emission

D) None of these

4 / 10

The atomic spectra deals with the measurement of?

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A) Wavelengths

B) Intensities of electromagnetic radiations emitted by atoms

C) Intensities of electromagnetic radiations absorbed by atoms

D) All of these options

5 / 10

According to Bohr’s theory of Hydrogen atom, only those atomic orbits with radii ‘r’ and atomic shell ‘n’ around the nucleus are allowed which have the angular moments:

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A) rh / 2π

B) nh / 2π

C) 2πn / h

D) 2πr / h

6 / 10

Energy difference in balmer series for longest wavelength is

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A) 1.89 eV

B) 2.9eV

C) 5.6eV

D) 7.8 eV

7 / 10

When are x-rays used in crystallography?

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A) to prevent interference

B) to prevent diffraction

C) to perform interference

D) to perform diffraction

8 / 10

The wavenumber of a photon in Brackett series is 9/400 R then electron transited from orbit with the quantum number:

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A) n=3

B) n=2

C) n=4

D) n=5

9 / 10

Atomic spectra is a ______ spectra.

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A) Continuous

B) Discrete

C) Both options A and B

D) None of these options are correct

10 / 10

The spectrum of white light lies ————-

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A) Above 300 nm

B) Below 300 nm

C) In between UV to IR

D) None of these

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