Which one of the following is a wrong statement regarding to the postulates of Thomson's atom model ?
Atom consists of a positively charged sphere.
Electrons are uniformly distributed in that sphere.
Atom as a whole is electrically neutral.
The positive and negative charges are different in magnitude.
Proton is deflected towards the ___________ charged plate.
Positively
Negatively
Illuminated
None of these
Anode rays are found to be a stream of :
Protons
Electrons
Neutrons
Neutrinos
During discharge tube experiment ,_______________ rays are emitted from the cathode.
Anode rays
Cosmic rays
Cathode rays
The properties of ____________ rays depends upon the nature of the gas taken in the discharge tube.
Cathode
Anode
U.V.
The scientist who discovered portons
Rutherford
Goldstein
Bohar
None of them
Which one of the following is a wrong statement regarding the postulates of Dalton's atomic theory ?
Matter is made up of small indivisible particles called atom.
Atoms of same element are different in all respects.
Atoms of different elements are different in all respects.
Atom is the smallest particle that takes part in a chemical reaction.
Which law states that "A pure chemical compound prepared by any method consists of the same elements combined together in a fixed proportion by mass" ?
Law of conservation of mass
Law of reciprocal proportions
Law of multiple proportions
Law of definite proportions
The presence of positively charged particles in the atom has been predicted by :
Neils Bohr
J.J. Thomson
Millikan
Who proposed first the word 'electron' for atom of electricity ?
William Crooke
Proust
Stoney
