Chapter 20 - Atomic Spectra - 5

Chapter 20 - Atomic Spectra - 5

1. The quantized radius of 1^st Bohr orbit of a hydrogen atom is:

a) 0.53nm
b) 0.053mm
c) 0.53mm
d) 0.053m

2. Electromagnetic rays which lies above the X-rays region are called:

a) None of above
b) Gamma rays
c) Infrared radiation
d) Ultraviolet radiation

3. One or more electrons are completely removed from an atom then atom is said to be:

a) Polarized
b) Ionized
c) Excited
d) Stabilized

4. The magnitude of ionization potential for H₂ is:

a) -3.40ev
b) -13.6ev
c) 13ev
d) -1.51ev

5. If E_o represents the ground state then the Rydberg’s constant R can be expressed

a) R=hf/Eo
b) R=hc/Eo
c) R=Eo/hc
d) R=EoC/h

6. X-Rays diffraction reveals that they are:

a) Particle type
b) Wave particle type
c) All of above
d) Wave type

7. Laser can be made from certain;

a) Liquids
b) Gases
c) Solids
d) All of the above

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