The presence of positively charged particles in the atom has been predicted by :
Neils Bohr
J.J. Thomson
Goldstein
Millikan
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.
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
None of these
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
Barium chloride reacts with sodium sulphate solution to form :
Sodium thiosulphate
Barium sulphate
Sulphur dioxide
Hydrogen sulphide
________ proposed that atom consists of a positively charged sphere where electrons are embedded in that sphere
Thomson
Dalton
Bohr
Rutherford
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.
______________ is produced when one electron is removed from one hydrogen atom.
Electron
Neutrino
Antineutrino
Proton
The mass of an electron
1/1940
1/2940
1/1840
