1.
Find the odd one ?
a. Marble
b. Chalk
c. Lime Stone
d. Slaked
Lime
2.
Diamond
is harder than graphite because of:
a. Difference of layers of atoms
b. Tetrahedral structure of diamonds
c. Difference
of crystaline structures
d. None of these
3.
A
super conductor is characterised by:
a. Zero
permeability
b. Low permeability
c. High permeability
4.
Of
the various forms of carbon, which one is used for absorption purpose?
a. Diamond
b. Graphite
c. Coke
d. Wood
Charcoal
5.
The
main constituents of Pearl are:
a. Calcium
Carbonate, Magnesium Carbonate
b. Calcium oxide, Ammonium Chloride
c. Argonite
, Chonchiolin
d. Ammonium Sulphate, Sodium Carbonate
6.
An
element that does not occur in nature but can be produced artificially is:
a. Thorium
b. Radium
c. Plutonium
d. Uranium
7.
The
inert gas which is substituted for nitrogen in the air, used by deep sea
drivers for breathing is:
a. Helium
b. Argon
c. Krypton
d. Xenon
8.
The
group of metals Fe, Co, Ni may be best called as:
a. Alkali metals
b. Rare metals
c. Main group metals
d. Transition
metals
9.
Which
of the following characters is not shown by hydrogen:
a. It burns in air to form water
b. It
supports combustion
c. It combines with almost all metals forming
hydrides
d. It readily combines with fluorine and chlorine
10.
Which
of the following elements is obtained from sea weeds?
a.
Argon
b.
Sulphur
c.
Vanadium
d.
Iodine
11.
The
metallic constituents of hard water are:
a. Magnesium, Calcium and tin
b. Iron, tin and calcium
c. Calcium,
magnesium and iron
d. Magnesium, tin and iron
12.
The
property of a substance to absorb moisture from the air on exposure is called:
a. Osmosis
b. Desiccation
c. Efflorescence
d. Deliquescene
13.
Brass
gets discoloured in air due to the presence of which gas in air:
a. Carbon dioxide
b. Oxygen
c. Hydrogen
Sulphide
d. Nitrogen
14.
Quartz crystals normally used in quartz clocks
etc. is chemically:
a.
Sodium Silicate
b.
Silicon dioxide
c.
Germenium dioxide
d.
Hydrogen Sulphide
15.
Bell
Metal is an alloy of:
a. Brass and Nickel
b. Zinc and Copper
c. Tin
and Copper
d. Nickel and Copper
16.
The
high temperature superconductors are:
a.
Metal alloys
b.
Ceramic oxides
c.
Inorganic polymers
d.
Pure rare earth metals
17.
The
ingredients of Gun metal are:
a.
Iron, tin
b.
Copper, tin
c.
Iron, brass, tin
d.
Iron, zinc, titanium
18.
The gas usually causing explosions in coal
mines is:
a. Hydrogen
b. Carbon monoxide
c. Air
d. Methane
19.
Cotton fibers are made of:
a.
Cellulose
b.
Starch
c.
Proteins
d.
Fats
20.
Which
of the following ores does not contain iron?
a. Haematite
b. Magnetite
c. Limonite
d.
Cassiterite