Identify the wrong statement regarding the properties of cathode rays ?
Cathode rays are deflected towards the negatively charged plate.
Cathode rays are deflected perpendicular to the applied magnetic field when it passed through a magnetic field.
Cathode rays are made up of small particles.
Cathode rays travel in straight line.
During any physical or chemical change takes place, the total mass of the matter remains:
Different
Zero
Same
None of these
Anode rays are found to be a stream of :
Protons
Electrons
Neutrons
Neutrinos
Cathode rays are :
Positrons
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.
Who proposed first the word 'electron' for atom of electricity ?
J.J. Thomson
William Crooke
Proust
Stoney
The mass of an electron
1/1940
1/2940
1/1840
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
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.
The scientist who discovered portons
Rutherford
Goldstein
Bohar
None of them
