1) The high reactivity of fluorine is due to:
a) Its high electro negativity.
b) Small size of fluorine atom.
c) Availability of d-orbitals.
d) Strong F – F bond.
b) Small size of fluorine atom.
c) Availability of d-orbitals.
d) Strong F – F bond.
ANSWER : Its high electro negativity
2) The iron ore magnetite consists of:
a) Fe2O3
b) Fe3OH4
c) FeCO3
d) 3Fe2O3, 3H2O
b) Fe3OH4
c) FeCO3
d) 3Fe2O3, 3H2O
ANSWER : Fe2O3
3) Which among the following is most electronegative element?
a) Sodium.
b) Bromine.
c) Fluorine.
d) Oxygen.
b) Bromine.
c) Fluorine.
d) Oxygen.
ANSWER : Fluorine
4) Which is the most commonly used bleaching agent?
4) Which is the most commonly used bleaching agent?
a) Alcohol.
b) Carbon dioxide.
c) Chlorine.
d) Sodium chlorine.
b) Carbon dioxide.
c) Chlorine.
d) Sodium chlorine.
ANSWER : Chlorine
5) Which is the method that cannot be used to remove permanent hardness of water?
a) Distillation.
b) Boiling.
c) Adding caustic soda.
d) Adding sodium carbonate.
b) Boiling.
c) Adding caustic soda.
d) Adding sodium carbonate.
ANSWER : Boiling
