1
Which of the following
is essential for the plants to help them in the formation of chlorophyll?
a)
Potassium
b)
Magnesium
c)
Calcium
d)
Phosphorus
2
The material used for
bleaching paper pulp is:
a)
Lime
b)
Alum
c)
Caustic soda
d)
Sodium hypochlorite
3
Which of the following
is used as a preservative of food articles?
a)
Sodium bicarbonate
b)
Sodium benzoate
c)
Sodium carbonate
d)
Sodium chloride
Note: Sodium Benzoate (NaC7H5O2) is used food preservative with
E number E211
4
Milk in natural form has
a certain amount of sugar. This sugar is called:
a)
Fructose
b)
Glucose
c)
Sucrose
d)
Lactose
5
Blood is classified
biochemically as a:
a)
Cell
b)
Liquid
c)
Tissue
d)
Cartilage
6
Foxglove plant yields a
drug which is a stimulants to:
a)
Kidney
b)
Brain
c)
Lungs
d)
Heart
7
The function of a
catalyst in a reaction is to :
a)
Decrease the rate of
reaction
b)
Increase the rate of
reaction
c)
Increase the pressure of
reactants
d)
Decrease the pressure of
reactants
8
Which of the following
gases is used for refrigeration?
a)
Sulphur dioxide
b)
Chlorine
c)
Freon
d)
Phosphine
9
Which plant stores food
in the stem?
a)
Ginger
b)
Carrot
c)
Raddish
d)
Groundnut
10
When a ship enters a sea
from a river, its level:
a)
Remains same
b)
Falls
c)
Rises
d)
Rises or fall depending
on the condition and material of the ship
11
The sky is blue in color
because of:
a)
Combination of various
lights producing blue color
b)
The moisture present in
the air
c)
The accumulation of
smoke in the sky
d)
The scattering of light
by dust particle or air molecules
12
If a body is taken from
the earth to the moon:
a)
Its mass will not be
affected
b)
Its mass will decrease
c)
Its weight will become
more
d)
Both its mass and weight
will decrease
13
An iron nail floats on
mercury but skins in water because:
a)
Mercury is a metal and
water is not
b)
Upper layer of mercury
is strong
c)
Mercury is a liquid
metal and iron is a soild metal
d)
Iron is less dense than
mercury
14
An electric bulb
produces a loud sound when broken, because:
a)
The glass is brittle
b)
The gas inside the bulb
suddenly expands
c)
The gas makes the
explosion
d)
The air rushes into the
partial vaccum in the bulb
15
A person climbing a hill
bends forward so as to:
a)
Reduce chances of
slipping
b)
Increase his stability
c)
Increase his stamina
d)
Move faster
16
The freezer in a
refrigerator is fitted near the top:
a)
Without any specific and
particular purpose
b)
Because it is convenient
c)
So that it can cool the
whole interior by setting up convection current
d)
To keep it away from the
hot compressor
17
The cover of a solar
cooker is made of a glass:
a)
Because glass allows
heat radiation from the sun into the container but not out of it
b)
To enable us to see the
food cooking
c)
Because heat is radiated
without absorption by glass
d)
As glass is a good
conductor of heat and cheap
18
Chlorine is a/an :
a)
Halogen
b)
Alloy
c)
Metal
d)
Noble gas
19
Which of the following
is not alloy?
a)
Brass
b)
Bronze
c)
Steel
d)
Zink
Note: Steel is alloy of iron and carbon
Brass is copper and zinc
Bronze is an alloy consisting primary of copper. The addition of
other metals (Usually tin, sometimes arsenic)
20
Which of the following
is an insecticide?
a)
TNT
b)
DDT
c)
Urea
d)
Alcohol
21
IC chips for computers
are usually made of?
a)
Chromium
b)
Lead
c)
Silicon
d)
Gold
22
Which of the following
is used as dry ice?
a)
Carbon dioxide
b)
Ammonia
c)
Oxygen
d)
Ice with raw dust
23
The normal unit of
measurement of distance of a star is:
a)
Kilometer
b)
Light year
c)
Nautical mile
d)
Knot
24
Solution of washing soda
in water will be:
a)
Alkaline
b)
Acidic
c)
Neutral
d)
None of these
Note: Washing soda is a highly alkaline chemical compound that
can be used from laundry
25
Vitamin C is also
called:
a)
Ascorbic acid
b)
Nucleic acid
c)
Lactic acid
d)
Hydrochloric acid
26
Pearls are found in
a)
Turtles
b)
Snails
c)
Tortoises
d)
Oysters
27
Coal burns in air
because air contains:
a)
Hydrogen
b)
Oxygen
c)
Nitrogen
d)
Carbon dioxide
28
A substance which glows
and is used in watch dials is:
a)
Sodium
b)
Sulphur
c)
Phosphorus
d)
Chlorine
29
Which of the following
chemical is used by photographers?
a)
Sodium sulphide
b)
Silver bromide
c)
Potassium cyanide
d)
Ivory powder
30
The process of coating
iron with zink is known as:
a)
Vulcanization
b)
Electroplating
c)
Polishing
d)
Galvanizing
Note: galvanization is the process of applying a Protective zinc
coating to steel or iron to prevent rusting. The most common method is hot dip
galvanization
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