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...