Space around nucleus where finding probability of electrons is maximum is called ____________________?
(A) Orbital
(B) Orbit is elliptical
(C) subshell
(D) Electron cloud
Atom with higher atomic number produces X-rays of__________________?
(A) Shorter wavelength
(B) Larger wavelength
(C) X-ray not produced
(D) All are possible
When electrons collide with heavy metals than ___________ are produced?
(A) Beta-rays
(B) Alpha-rays
(C) X-rays
(D) Gamma-rays
Atomic orbits having same energy are called________________?
(A) Degenerate orbitals
(B) Bonding molecular orbitals
(C) Anti bonding molecular orbitals
(D) Half filled orbitals
The correct electronic configuration of Cu is ___________________?
(A) [Ar]4s1
(B) [Ar]4s2
(C) [Ar]3d104s1
(D) [Ar]3d94s2
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
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________________?
(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
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________________?
(A) de-Broglie duel nature of matter
(B) Bohrs model
(C) Plancks Quantum theory
(D) Rutherfords atomic model