1. Jet
engines are:
a. Turbine
engines
b. Reaction engines
c. Rotary
engines
d. External
combustion engines
2. Fermentation
invariably leads to the formation of:
a.
Ethyl
alcohol
b. Methyl
alcohol
c. Carbon
dioxide
d. Acetic
acid
3. The Sri
Lanka Broadcasting Corporation broadcasts its programs on the 25 meter band.
Which one of the following is the frequency of broadcasting?
a. 12 Kilo
Hertz
b. 1.2 Mega
Hertz
c.
12 Mega
Hertz
d. 120 Mega
Hertz
4. Boyle’s
law deals with the relationship of:
a. Pressure and volume
b. Mass and
volume
c.
Pressure
and temperature
d. Volume
and temperature
5. White
phosphorous is generally kept under
a. Alcohol
b.
Water
c. Glycerin
d. Kerosene
oil
6. Which of the following is amorphous?
a.
Glass
b. Sodium
chloride
c. Powdered
marble
d. Cane
sugar
7. A
solution containing one mole of a solute dissolved in 1000g. Of solvent is:
a. A normal
solution
b.
A molal
solution
c. A molar
solution
d. An
unsaturated solution
8. Neutron
was discovered by:
a. Einstein
b. Rutherford
c. Bohr
d. Chadwick
9. Cooking
oil can be converted into vegetable ghee by the process of:
a.
Hydrogenation
b. Distillation
c. Crystallization
d. Oxidation
10. The
proportion of nitrogen in the open air is:
a. 21% by
volume
b. 50% by
weight
c. 21% by
weight
d. 78% by volume
11. Iron
obtained from blast furnace is:
a. Mild
steel
b.
Pig iron
c. Structural
steel
d. Wrought
iron
12. Hydrogen
is liberated from nitric acid by the action of:
a. Nickel
b. Mercury
c.
Magnesium
d. Copper
13. Which
gas is used in the preparation of soda water?
a. Carbon
monoxide
b. Sulphur
c. Chlorine
d. Carbon dioxide
14. Sulphur
dioxide bleaches coloring matter by:
a.
Reduction
b. Oxidation
c. Dehydration
d. Decomposition
15. Calcinations is the process of:
a. Heating
the ore in an oxidizing atmosphere
b. Heating
the ore in a reducing atmosphere
c.
Heating
the ore in the absence of air
d. Heating
the ore in the presence of air
16. Silver
halides are used in photographic plates because they are:
a. Oxidised
in air
b. Colourless
c. Easily
soluble in hypo solution
d. Readily reduced by light
17. Cooling
of the molten glass is technically known as:
a. Soldering
b. Moulding
c. Tampering
d. Annealing
18. Brass is
an alloy of:
a.
Copper
and Zinc
b. Copper
and aluminium
c. Zinc and
aluminium
d. Manganese
and copper
19. 20. Milk
is an example of:
a. Suspension
b.
Emulsion
c. Gel
d. Foam
20. Which of
the following states Avogadro’s Law?
a. The
pressure of a fixed mass of a gas at constant temperature is inversely
proportional to its volume
b. At a
constant temperature and pressure, the rate of diffusion of a gas is inversely
proportional to the square root of its density
c.
Equal
volumes of all gases under similar conditions of temperature and pressure contain
equal numbers of molecules
d. The
production of specific heat and atomic weight of a solid element is constant
approximately 6.4
21. The aim
of galvanizing the iron is to:
a. Give it
a better look
b.
Protect
it from rusting
c. Increase
its hardness
d. Make it
more elastic
22. Which of
the following elements is not Radio-active?
a. Uranium
b. Radium
c.
Zirconium
d. Plutonium
23. Which of
the following may correctly be called a “Coligative property”?
a. Half-life
of a radioactive element
b. Surface
tension of a solution
c. Conductance
of solution
d. Osmotic pressure of a solution
24. Gelatin is used as ingredient in the
manufacture of ice-cream. This is due to:
a. To
stabilize the colloid and prevent crystal Formation
b. To
prevent the formation of colloid
c. To give
colour to the colloid
d. To give
flavour to the colloid
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