1.
Which of the following vitamins
is helpful for coagulation of blood?
(A)
C
(B)
D
(C)
E
2.
For purifying drinking water, alum is used
(A)
For coagulation of mud
particles
(B)
To kill bacteria
(C)
To remove salts
(D)
To remove gases
3.
A weather balloon is not fully
inflated on the ground because
(A)
If the balloon is fully
inflated , it may not remain stable in a storm
(B)
The air inside the balloon
expands as it rises and may burst
(C)
It cannot withstand the outside
pressure it fully inflated
(D)
None of these
4.
Vitamin B12 is most useful for
combating
(A)
Anaemia
(B)
Goiter
(C)
Night blindness
(D)
Rickets
5.
The volume of which of the
following materials decreases when it is heated from 0°c to 5°c?
(A)
Air
(B)
Copper
(C)
Water
(D)
Mercury
6.
On a night when the sky is
clear, the temperature may dip considerably; on a cloudy night the temperature
will usually dip much less. The reason for this difference is that
(A)
The clear sky allows radiant
energy to escape reality from the earth
(B)
On a cloudy night the clouds
are warm and therefore retard the cooling
(C)
The clear sky allows the cold of
outer space to reach the earth
(D)
Currents of air carry the heat away from the earth on
a clear night
7.
Which of the following
chemicals is useful in photography?
(A)
Aluminium hydroxide
(B)
Potassium nitrate
(C)
Silver bromide
(D)
Sodium chloride
8.
The purest form of water can be obtained from
(A)
A deep tube well
(B)
A running stream
(C)
A hot water spring
(D)
A heavy shower of rain
9.
Which of the following vitamins
is store in the liver?
(A)
Vitamin A
(B)
Vitamin C
(C)
Vitamin E
(D)
Vitamin k
10.
Which of the following vitamins
is stored in the liver?
(A)
Antibiotics
(B)
Insulin
(C)
Penicillin
(D)
Streptomycin
ANSWERS:
21.
D
22.
A
23.
B
24.
A
25.
C
26.
A
27.
C
28.
D
29.
A
30 .
B