What is the name of the scientist
  • JJ Thomson
  • Neil Bohr
  • Rutherford
  • James Chadwick
What is the lightest subatomic particle
  • atom
  • electron
  • proton
  • neutron
The law of conservation of mass states that
  • Matter is created in a chemical reaction
  • Matter is destroyed in a chemical reaction .
  • Matter is either created or destroyed in a chemical reaction .
  • Matter is neither created nor destroyed in a chemical reaction .
The Ratio by mass of elements Hydrogen and oxygen in water is
  • 1:2
  • 1:8
  • 2:1
  • 8:1
How many atoms ae there in a molecule of water ?
  • 1
  • 2
  • 3
  • 4
The cation present in aluminium hydroxide is that of
  • Aluminium
  • Oxide
  • Hydrogen
  • Hydroxide
The number of ions in a molecule of aluminium oxide is
  • 2
  • 3
  • 4
  • 5
The correct formula of sodium chloride
  • nacl
  • NACL
  • NaCl
  • NacL
ASSERTION-The sum of the masses of the reactants is equal to the sum of the masses of the products .Reason-Matter is creatsed during a chemical reaction
  • Both Assertion and reason are correct and reason is the correct explanation of assertion .
  • Both Assertion and reason are correct but reason is notthe correct explanation of assertion .
  • Assertion is true but reason is false .
  • Assertion is false but reason is true .
The number of cations in a molecule of sodium sulphate is /are
  • 1
  • 2
  • 3
  • 4
When aqueous solutions of barium chloride and sodium sulphate react , the precipitate formed is
  • Curdy white
  • Reddish brown
  • Yellow
  • Green
The atomic mass of carbon is
  • 6 u
  • 8 u
  • 12 u
  • 16 u
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0