(a) Mixture
(b) Compound
(c) Solution
(d) Element
Answer:
Who among the following proposed that atom is indivisible?
(a) Rutherford
(b) Avogadro
(c) Dalton
(d) Berzelius
Answer:
Tritium is an isotope of
(a) Nitrogen
(b) Oxygen
(c) Hydrogen
(d) Phosphorus
Answer:
Propagation of light quanta may be described by
(a) neutrons
(b) electrons
(c) photons
(d) protons
Answer:
The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all
(a) Halogens
(b) Inert gas
(b) Light metals
(d) Rare earth metals
Answer:
Silver containing lead as an impurity is removed by
(a) Distillation
(b) Lavigation
(c) Poling
(d) Cupellation
Answer:
Which one among the following is used in making gunpowder?
(a) Sodium strearate
(b) Calcium sulphate
(c) Magnesium sulphate
(d) Potassium nitrate
Answer:
The colour of hydrogen is
(a) Colourless
(b) black
(c) Yellow
(d) Orange
Answer:
Boron behaves as a
(a) Metalloid
(b) Transition metal
(c) Non-metal
(d) Metal
Answer:
Which of the following is not a source of sulphur
(a) Gypsum
(b) Cinnabar
(c) Carnalite
(d) Galena
Answer: