The properties of ____________ rays depends upon the nature of the gas taken in the discharge tube.
Cathode
Anode
Cosmic rays
U.V.
The scientist who discovered portons
Rutherford
Goldstein
Bohar
None of them
Cathode rays are produced when high voltage is applied across a gas under :
High pressure
Low pressure
Very low pressure (0.1 mm of mercury)
Ordinary pressure
Cathode rays are :
Protons
Neutrons
Electrons
Positrons
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.
________ proposed that atom consists of a positively charged sphere where electrons are embedded in that sphere
Thomson
Dalton
Bohr
Barium chloride reacts with sodium sulphate solution to form :
Sodium thiosulphate
Barium sulphate
Sulphur dioxide
Hydrogen sulphide
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
The presence of positively charged particles in the atom has been predicted by :
Neils Bohr
J.J. Thomson
Millikan
