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 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.
During any physical or chemical change takes place, the total mass of the matter remains:
Different
Zero
Same
None of these
Cathode rays are :
Protons
Neutrons
Electrons
Positrons
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.
________ proposed that atom consists of a positively charged sphere where electrons are embedded in that sphere
Thomson
Dalton
Bohr
Rutherford
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
The scientist who discovered portons
Goldstein
Bohar
None of them
During discharge tube experiment ,_______________ rays are emitted from the cathode.
Anode rays
Cosmic rays
Cathode rays
The mass of an electron
1/1940
1/2940
1/1840