Color of fluorescence produced by cathode rays depends upon________________?
A. Temperature
B. Pressure
C. Volume
D. Composition of glass
Submitted by :- Jamil Ahmed
The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
A. 7
B. 1
C. 12
D. 16
Submitted by :- Jamil Ahmed
The letters s p d and f are used to represent which quantum numbers________________?
A. Principal
B. Azimuthal
C. Magnetic
D. Spin
Submitted by :- Jamil Ahmed
Three quantum number have been derived from equation of____________________?
A. de-Broglie
B. Plancks
C. Schrodinger
D. Heisenberg
Submitted by :- Jamil Ahmed
Splitting of spectral lines when atoms are subjected to strong electric filed is called_________________?
A. Zeeman effect
B. Stark effect
C. Photoelectric effect
D. Compton effect
Submitted by :- Jamil Ahmed
Quantum number which tells the energy of electron is________________?
A. n
B. 1
C. m
D. s
Submitted by :- Jamil Ahmed
Wavelength of electron was verified by_________________?
A. Moseley
B. Davisson and Germer
C. Einstein
D. Roentgen
Submitted by :- Jamil Ahmed
Sommerfelds modification in Bohr’s model is_______________?
A. Orbit is cylindrical
B. Orbit is elliptical
C. Orbit is longitudinal
D. Orbit is asymmetrical
Submitted by :- Jamil Ahmed
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
Submitted by :- Jamil Ahmed
The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be________________?
A. 1
B. 3
C. 5
D. 7
Submitted by :- Jamil Ahmed