A. Plancks theory
B. Dual nature of matter
C. Heisenbergs uncertainty principle
D. All of these
Related Mcqs:
- When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?
A. 0.33 nm
B. 0.34 nm
C. 0.35 nm
D. 0.36 nm - Sommerfelds modification in Bohrs model is_______________?
A. Orbit is cylindrical
B. Orbit is elliptical
C. Orbit is longitudinal
D. Orbit is asymmetrical - Charge of electron was measured by__________________?
A. J.J Thomson
B. Millikan
C. Rutherford
D. Perrin - Centrifugal forces are balanced in atom by__________________?
A. Attractive forces
B. Repulsive force
C. Electrons
D. Neutrons - Boiling point elevations can be measured by__________________?
A. Beckmanns method
B. Landsbergers method
C. Linds method
D. none of the above - Cannizzaros reaction is not given by__________________?
A. formaldehyde
B. acetaldehyde
C. benzaldehyde
D. trimethyl acetaldehyde - According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be __________________?
A. Triangular
B. Square planner
C. Trigonal bipyramidal
D. Octahedral - Only London dispersion forces are present among the_________________?
A. Molecules of water in liquid state
B. Atoms of helium in gaseous state at high temperature
C. Molecules of hydrogen chloride gas
D. Molecules of solid iodine - For industrial preparation of CH3CHO catalytic promoter is_________________?
A. PdCl2
B. Cu2Cl2
C. CuCl2
D. PbCl2 - For which system does the equilibrium constant Kc has unit of (concentration)-1__________________?
A. N2+3H2 2NH3
B. H2+I2 2HI
C. 2NO2 N2H4
D. PCI5 PCI3+CI2
