Friday, October 18, 2013

General Science:

1) Among the following
which element is
common to all acids?
a) Hydrogen.
b) Carbon.
c) Oxygen.
d) Sulphur.
ANSWER : Hydrogen
2) Non-stick cooking
utensils are coated
a) Black paint.
b) Polystyrene.
c) PVC.
d) Teflon.
ANSWER : Teflon
3) Carbon, diamond and
graphite are together
a) Isotopes.
b) Isomers.
c) Isomorphs.
d) Allotropes.
ANSWER : Allotropes
4) What does soda
water contains?
a) Carbonic acid.
b) Carbon dioxide.
c) Nitrous acid.
d) Sulphuric acid.
ANSWER : Carbon dioxide
5) To remove
permanent hardness of
water what should be
a) Alum.
b) Lime.
c) Potassium
d) Sodium carbonate.
ANSWER : Sodium
6) Which among the
following is most
important ore of
a) Galena.
b) Calamine.
c) Bauxite.
d) Calcite.
ANSWER : Bauxite
7) From which mineral
is radium obtained?
a) Limestone.
b) Haematite.
c) Pitchblende.
d) Rutile.
ANSWER : Pitchblende
8) Which among the
following is in liquid
form at room
a) Lithium.
b) Sodium.
c) Cerium.
d) Francium.
ANSWER : Francium
9) Which among the
following was to be
discovered first in the
chromospheres of the
a) Helium.
b) Neon.
c) Xenon.
d) Krypton.
ANSWER : Helium
10) Which among the
following is known as
laughing gas?
a) Carbon monoxide.
b) Nitrous oxide.
c) Sulphur dioxide.
d) Hydrogen peroxide.
ANSWER : Nitrous oxide
11) Actinides are the
elements with atomic
numbers from:
a) 97 to 104.
b) 101 to 115.
c) 36 to 43.
d) 89 to 103.
ANSWER : 89 to 103
12) Diamond is an
allotropic form of:
a) Silicon.
b) Sulphur.
c) Carbon.
d) Germanium.
ANSWER : Carbon
13) In fireworks, the
green flame is
produced because of:
a) Sodium.
b) Barium.
c) Mercury.
d) Potassium.
ANSWER : Barium
14) LPG consists mainly
a) Methane, ethane and
b) Methane, hexane and
c) Ethane, hexane and
d) Methane, butane and
ANSWER : Methane,
butane and propane
15) Which is the metal
that pollutes the air of
a big city?
a) Lead.
b) Copper.
c) Chromium.
d) Cadmium.
16) Bell metal is an alloy
a) Nickel and copper.
b) Brass and nickel.
c) Zinc and copper.
d) Tin and copper.
ANSWER : Tin and copper
17) Balloons are filled
a) Oxygen.
b) Helium.
c) Argon.
d) Nitrogen.
ANSWER : Helium
18) Which among the
following is the lightest
a) Lead.
b) Silver.
c) Lithium.
d) Mercury.
ANSWER : Lithium
19) What are the main
constituents of pearls?
a) Calcium carbonate
and magnesium
b) Aragonite and
c) Ammonium sulphate
and sodium carbonate.
d) Calcium oxide and
ammonium chloride.
ANSWER : Calcium
carbonate and
magnesium carbonate
20) Which among the
following metals remain
in liquid for under
normal conditions?
a) Uranium.
b) Mercury.
c) Zinc.
d) Radium.
ANSWER : Mercury