1. Hybridization is
(A)
Downward movement of water
through soil
(B)
A process of tilling the land
(C)
Decayed vegetable matter
(D)
Cross-fertilisation between two
varieties
2.
Of the following foods , which
one is the best source of protein?
(A)
Butter
(B)
Fish
(C)
Lettuce
(D)
Milk
3.
The red blood cells are formed
in the
(A)
Heart
(B)
Liver
(C)
Lymph nodes
(D)
Bone marrow
4.
Wet- bulb and dry-bulb
thermo-maters are used to determine
(A)
The minimum temperature at a
place in any 24- hour period
(B)
Relative humidity
(C)
Air pressure
(D)
The maximum temperature at a place
in any 24- hour period
5.
One of the isotopes of iodine
has a “half life” of 25 minutes. This information tells us that if we start
with a given quantity of the isotopes , 50 minutes later there will remain
(A)
One- fourth of the original amount
(B)
None
(C)
One-half of the original amount
(D)
Approximately the same amount
6.
The most abundant element in
the earth’s atmosphere is
(A)
Carbon dioxide
(B)
Hydrogen
(C)
Oxygen
(D)
Nitrogen
7.
Exposure to sunlight helps a
person improve his health because
(A)
The infra-red light kills bacteria in the body
(B)
Resistance power increases
(C)
The pigment cells In the skin
get stimulated and produce a healthy tan
(D)
The ultraviolet rays convert
skin oil into Vitamin D
8.
Small amounts of iodine are necessary in our diet to
(A)
Prevent pellagra
(B)
Compensate for under activity
of the thyroid gland
(C)
Stimulate clotting of blood
(D)
Stimulate pituitary gland
9.
On a sudden cardiac
arrest, which of the following is
advised as a first step to revive the functioning of human heart?
(A)
Mouth to mouth resuscitation
(B)
Giving external cardiac massage
(C)
Sprinkling water on the face
(D)
Giving cool water on the face
10.
A triode differs from a
diode in the way that
(A)
It can amplify a signal
(B)
It has vacuum inside
(C)
It has a heated cathode
(D)
Its current is caused by the
photoelectric effect
ANSWERS :
11.
D
12.
B
13.
D
14.
B
15.
A
16.
D
17.
D
18.
B
19.
A
20. A