General Science-107

1.       Nuclear fission is caused by the impact of:

a.       Proton

b.      Electron

c.       Neutron

d.      (a) & (b)

2.       Parmanent hardness of water may be removed by the addition of:

a.       Alum

b.      Sodium Carbonate

c.       Lime

d.      Potassium Permanganate

3.       Potassium nitrate is used in:

a.       Salt

b.      Glass

c.       Fertiliser

d.      Medicine

4.       In which type of rocks are metals like Gold and Copper mostly found?

a.       Old igneous

b.      Old sedimentary

c.       Old metamorphic

d.      New metamorphic

5.       Which of the following gases is lighter than air?

a.       Carbon dioxide

b.      Oxygen

c.       Ammonia

d.      Chlorine

6.       Which of the following is used as lubricant?

a.       Graphite

b.      Silica

c.       Diamond

d.      Iron Oxide

7.       The purest form of iron is:

a.       Steel

b.      Pig iron

c.       Cast iron

d.      Wrought iron

8.       The percentage of carbon is the least in:

a.       Grey cast iron

b.      Wrought iron

c.       White cast iron

d.      Steel

9.       The colour of Emerald is:

a.       Violet

b.      Yellow

c.       Deep Green

d.      Prussian Blue

10.   Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of:

a.       Nitrates

b.      Zeolites

c.       Sulphonates

d.      None of these

11.   Rust is:

a.       A mixture of Fe2O3 and Fe(OH)2

b.      A mixture of FeO and Fe(OH)2

c.       FeO only

d.      A mixture of Fe2O3, 3H2O and FeO

12.   Liquefied Petroleum gas (LPG) consists of mainly:

a.       Methane, Ethane and Hexane

b.      Ethane, Hexane and Nonane

c.       Methane, Butane and Propane

d.      Methane, Hexane and Nonane

13.   The metal that is present in Photo Films is:

a.       Mercury

b.      Platinium

c.       Magnesium

d.      Silver

14.   Which of the following is in liquid form at room temperature?

a.       Cerium

b.      Sodium

c.       Francium

d.      Lithium

15.   Soda water contains:

a.       Nitrous acid

b.      Carbonic acid

c.       Carbon dioxide

d.      Sulphuric acid

16.   Which of the following is basis of the modern periodic table?

a.       Atomic mass

b.      Atomic number

c.       Atomic size

d.      Atomic volume

17.   Of the following metals, which one pollutes the air of a big city?

a.       Copper

b.      Cadmium

c.       Lead

d.      Chromium

18.   Brass is an alloy of:

a.       Nickel and Copper

b.      Copper and Silver

c.       Nickel and Zinc

d.      Zinc and Copper

19.   The element required for Solar energy conversion:

a.       Beryllium

b.      Silicon

c.       Tantalum

d.      Ultra pure carbon

20.   Monazite is an ore of:

a.       Sodium

b.      Titanium

c.       Thorium

d.      Zirconium