A. Brighter
B. Darker
C. Colourless
D. Hard to locate
Related Mcqs:
- 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 - The process by which a substance absorbs moisture upon exposure to atmosphere is called?
A. Efflorescence
B. Dehydrogenation
C. Desalination
D. DeliquescenceSubmitted by: Farhan Rana
- Energy released or absorbed when electrons are added in atom is_________________?
A. Ionization potential
B. Electronegativity
C. Electron affinity
D. Activation energy - Spectrum is produced due to________________?
A. Different wavelength
B. Different colours
C. Different intensities
D. all have little contribution - 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 - 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
- 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. - 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 - Atom with higher atomic number produces X-rays of__________________?
A. Shorter wavelength
B. Larger wavelength
C. X-ray not produced
D. All are possible - Centrifugal forces are balanced in atom by__________________?
A. Attractive forces
B. Repulsive force
C. Electrons
D. Neutrons
