Atomic Spectra Mcqs

Our collections of Multiple choice questions and answers focuses on study of Atomic Spectra in Physics. These questions are chosen from a collection of most authoritative and best reference books on Physics. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate knowledge on Atomic Spectra in Physics comprehensively.

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32.
UV radiation can be produced by

Heating the filament.

Electron excitation in the gas.

Ionization of atoms.

All the above.

33.
Wave-like characteristic of electron is demonstrated by

Line spectrum of atoms.

Production of x-rays.

Diffraction by crystalline solids.

Photoelectric effect.

35.
When we excite some atoms by heat collision or electrical discharge they will

Radiate electromagnetic energy with a continuous distribution of wavelength

Absorb particular wavelengths when white light is incident on them

Radiate electromagnetic energy of discrete characteristic wavelength

Emit either invisible or visible light

36.
When X-rays are passed through successive aluminum sheets what happens to their thickness?

Increases

It decreases

It remains same

Sometimes increases and sometimes decreases

37.
Which one of following postulate is in accordance with the Rutherfords model?

Continuous spectra for atoms

Discrete spectra for atoms

Either continuous nor discrete

No spectrum

39.
X-rays are diffracted by a crystal but not by a diffraction grating because

The ions in a crystal are well arranged.

The lines in a diffraction grating cannot reflect X-rays.

The penetration power of X-rays is high in a diffraction grating.

The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal

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