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
Chemistry Mcqs
Planks theory says energy is emitted__________________?
Planks theory says energy is emitted__________________?
A. In continuous manner
B. Discontinuous manner
C. Simultaneously
D. In the form of heat
The value of e/m ratio of electron is________________?
The value of e/m ratio of electron is________________?
A. 6.02 x 1023 C/kg
B. 1.7588 x 1020 C/kg
C. 9.1095 x 10-31 C/kg
D. 1.7588 x 1011 C/kg
Positive rays give flash on________________?
Positive rays give flash on________________?
A. AgNO3 plate
B. AgCl plate
C. ZnO
D. ZnS
Angle of deflection was studied by________________?
Angle of deflection was studied by________________?
A. Hitorff
B. Stoney
C. William Crookes
D. J.Perrin
Pressure in gas discharge tube was kept________________?
Pressure in gas discharge tube was kept________________?
A. 10 torr
B. 1 torr
C. 0.1 torr
D. 0.01 torr
Which one of the following explain the shape of orbitals _________________?
Which one of the following explain the shape of orbitals _________________?
A. Principal of quantum number
B. Azimuthal quantum number
C. Magnetic quantum number
D. S quantum number
Splitting of spectral lines when atom is subjected to magnetic field is called _______________?
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
Rutherfords planet like structure was defective and unsatisfactory because_________________?
Rutherfords planet like structure was defective and unsatisfactory because_________________?
A. Moving e- accelerate towards the nucleus
B. Continuous spectrum
C. behavior of electron remain unexplained
D. all
Which one is not true about cathode rays ?
Which one is not true about cathode rays ?
A. 9.11×10-31 Kg
B. Cast shadow
C. Heat up the platinum foil
D. Cannot ionize