1. Bleaching
powder is made from:
a.
Sulphur dioxide and gypsum
b.
Chlorine and Charcoal
c.
Soda ash and lime
d.
Lime
and Chlorine
2. The
two elements that are frequently used for making transistors are:
a.
Boron and Aluminium
b.
Silicon
and Germenium
c.
Iridium and Tungsten
d.
Niobium and Columbium
3. Which
of the following gas is not known as green house gas?
a.
Methane
b.
Carbon dioxide
c.
Nitrous
oxide
d.
CFC
4. Which
of the following is not a neutral oxide?
a.
Carbon Monoxide
b.
Sulphur
Dioxide
c.
Water
d.
Nitric Oxide
5. Which
of the following is used in making smoke bombs?
a.
Sulphur
b.
Phosphorus
c.
Hydrogen
d.
Carbon
6. Caustic
Soda is:
a.
Nacl
b.
Na2CO3
c.
NaOH
d.
NaHCO3
7. Chemical
formula of Water glass is:
a.
Na2SiO3
b.
Al2O3
c.
NaAlO2
d.
CaSiO3
8. Which
of the following is not a bleaching agent?
a.
Sulpher di-oxide
b.
Carbon
di-oxide
c.
Sodium hypochlorite
d.
Chlorine
9. The
gas usually filled in electric bulb is;
a.
Hydrogen
b.
Oxygen
c.
Nitrogen
d.
Carbon di-oxide
10. Heavy
water is:
a.
Tritium oxide
b.
Deuterium
oxide
c.
Rain water
d.
Water at 4°C
11. The gases used in different types of welding
would include:
a.
Oxygen & Hydrogen
b.
Oxygen, acetylene & argon
c.
Oxygen
& acetylene
d.
Oxygen, hydrogen & nitrogen
12. Which
of the following alloys is used for making magnets?
a.
Duralumin
b.
Stainless Steel
c.
Alnico
d.
Magnelium
13.
Parmanent hardness of
water may be removed by the addition of:
a. Alum
b. Sodium
Carbonate
c. Lime
d. Potassium Permanganate
14.
Potassium nitrate is
used in:
a.
Salt
b.
Glass
c.
Fertiliser
d.
Medicine
15.
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
16.
Which of the following
gases is lighter than air?
a.
Carbon dioxide
b.
Oxygen
c.
Ammonia
d.
Chlorine
17.
Which of the following
is used as lubricant?
a. Graphite
b. Silica
c. Diamond
d. Iron Oxide
18.
The purest form of iron
is:
a. Steel
b. Pig iron
c. Cast iron
d. Wrought
iron
19.
The percentage of carbon
is the least in:
a.
Grey cast iron
b.
Wrought iron
c.
White cast iron
d.
Steel
20.
The colour of Emerald is:
a. Violet
b. Yellow
c. Deep
Green
d. Prussian Blue
21.
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