When an atom absorbs energy the lines in the spectrum will appear which are_________________?

Related Mcqs:

1. Splitting of spectral lines when atom is subjected to magnetic field is called _______________?

   A. Zeemans effect
   B. Starks effect
   C. Photo electric effect
   D. Compton effect

2. The process by which a substance absorbs moisture upon exposure to atmosphere is called?

   A. Efflorescence
   B. Dehydrogenation
   C. Desalination
   D. Deliquescence 

   Submitted by: Farhan Rana

3. Energy released or absorbed when electrons are added in atom is_________________?

   A. Ionization potential
   B. Electronegativity
   C. Electron affinity
   D. Activation energy

4. Spectrum is produced due to________________?

   A. Different wavelength
   B. Different colours
   C. Different intensities
   D. all have little contribution

5. Pfund series are produced in the spectrum of hydrogen atom__________________?

   A. when electrons jump down to 2nd- orbit
   B. when electrons jump down to 3rd- orbit
   C. when electrons jump down to 4th- orbit
   D. when electrons jump down to 5th- orbit

6. Generally the limit of visible spectrum is__________?

   A. 1000 to 300 A°
   B. 3800 to 7600 A°
   C. 8000 to 10,000 A°
   D. 12,000 to 15,000 A°

   Submitted by: Muhammad Ali Kunbhar

7. All of the following were theorized by Bohr in his description of the atom except__________________?

   A. Angular momentum of electrons in multiples of h/2?
   B. Electrons revolve in discrete circular orbits
   C. Energy of each electron is directly proportional to n2
   D. Electrons radiate energy continuously in a given orbit.

8. 2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?

   A. 2-times
   B. 3-times
   C. 4-times
   D. 6 times

9. Atom with higher atomic number produces X-rays of__________________?

   A. Shorter wavelength
   B. Larger wavelength
   C. X-ray not produced
   D. All are possible

10. Centrifugal forces are balanced in atom by__________________?

    A. Attractive forces
    B. Repulsive force
    C. Electrons
    D. Neutrons