General Science-106

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 crystalline structures

d.      None of these

3.       A super conductor is characterized by:

a.       Zero permeability

b.      Low permeability

c.       High permeability

d.      Infinite 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.      A mixture of (b) & (c)

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