Charge of electron was measured by__________________?
A. J.J Thomson
B. Millikan
C. Rutherford
D. Perrin
Atomic Structure
Free neutron changes into proton with the emission of__________________?
Free neutron changes into proton with the emission of__________________?
A. Neutrino
B. Electron
C. Both A & B
D. Meson
Increase in atomic number is observed during_________________?
Increase in atomic number is observed during_________________?
A. Alpha emission
B. Beta emission
C. Both A & B
D. Radioactivity
The number of fundamental particles in an atom of the lightest isotope carbon are_______________?
The number of fundamental particles in an atom of the lightest isotope carbon are_______________?
A. 6
B. 12
C. 18
D. 20
Atom cannot be divided into simple unitstheorized by________________?
Atom cannot be divided into simple unitstheorized by________________?
A. Rutherford
B. Dalton
C. Bohr
D. Schrodinger
The velocity of the photon____________________?
The velocity of the photon____________________?
A. Is independent of wavelength
B. Depends upon source
C. Depends upon its frequency
D. Equals to the square of amplitude
The relationship between energy of a photon of light and its frequency is given by________________?
The relationship between energy of a photon of light and its frequency is given by________________?
A. de-Broglie duel nature of matter
B. Bohrs model
C. Plancks Quantum theory
D. Rutherfords atomic model
Positive rays are produced__________________?
Positive rays are produced__________________?
A. By burning of gas
B. By cooling of the gas
C. By the bombardment of cathode rays on gas molecules
D. From anode like cathode rays produced from cathode
Colour of fluorescene produced by cathode rays depends upon________________?
Colour of fluorescene produced by cathode rays depends upon________________?
A. Temperature
B. Pressure
C. Volume
D. Composition of glass
The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
A. 7
B. 10
C. 12
D. 16