1. When a
man circles round the earth in a Satellite then his:
a. Mass
becomes zero but weight remains constant
b.
Mass
remains constant but weight becomes zero
c. Both
mass and weight remains constant
d. Both
mass and weight becomes zero
.jpg)
2. The
formation of a chemical bond is associated with:
a.
A
decrease in potential energy
b. An
increase in potential energy
c. No
change in potential energy
d. First a
decrease, then an increase in potential energy
3. Which of the following is the property of Carbon
monoxide?
a. Oxidizing
agent
b. Catalytic
agent
c. Neutral
oxide
d. Reducing agent
4. The
temperature below which a gas should be cooled before it can be liquefied by
pressure only, is termed as:
a. The
freezing point
b. The dew
point
c. The
semi-saturation point
d. The critical point
5. A number
of images of a candle flame can be seen in a thick mirror. The brightest image
is:
a. Last
b. Fourth
c. Third
d. Second
6. The rate
of loss of heat by a hot body depends upon:
a. Its
radiating area
b. Its
temperature
c. Its
nature of radiating surface
d. All the above factors
7. It takes
less time for food to be cooked in a pressure cooker. It is because:
a.
Boiling
point of water increases
b. Boiling
point of water decreases
c. Food
consumes less heat
d. It gives
heat internally
8. The name
of the galaxy in which the earth is a planet is:
a. Ursa
Major System
b. Ursa Minor
System
c.
The
Milky Way
d. Solar
system
9. Transformer
is a device to convert:
a. D. C.
into A. C.
b. Low
voltage D. C. into high voltage D.C.
c.
Low
voltage A. C. into high voltage A. C.
d. Mechanical
energy into electrical energy
10. The
earth moves round the sun in an Elliptical path and not in circular one, so the
Distance `
between the two is not fixed but keeps on varying as the earth goes around the
sun. The speed of the earth in its orbital path around the sun:
a.
Is variable
b. Decreases when the distance between them
increases and vice versa .
c. Increases
when the distance between them increases and vice versa
d. Increases
when the distance ‘between them increases and vice versa
11. A ray of
light from air enters water, then through a thick layer of glass placed below water.
After passing through glass, it again comes out in air medium. Then the final
Emergent ray will:
a. Bend
towards the normal
b. Bend
away from the normal
c. Have the
same path as if it had not passed through water and glass
d. Suffer lateral displacement
12. Welding is to join two pieces of metal by raising
the temperature at the joint by means of external heat of heavy electric
current, soldering is:
a. Separating
two pieces of metal by melting by external heat
b. Melting
to liquid the two pieces of different metals and mixing them to obtain a new
metal
c.
To use
an alloy for joining metal
d. Joining
two pieces of metals by means of Nails without using heat
13. Mention
the ray which appears to originate outside of the earth:
a.
Cosmic
ray
b. The
ultra-violet ray
c. The
alpha ray
d. The beta
ray
14.
What is always contained in amalgams?
a.
Mercury
b. Iron
c. Gold
d. Copper
15. Sound
travels fastest in:
a. Water
b.
Steel
c. Vacuum
d. Air
16. The
device used for converting alternating current to direct current is called:
a. Inverter
b.
Rectifier
c. Transmitter
d. Transformer
17. Water
pipes are apt to burst in cold weather because:
a. On
account of snow heavy pressure is exerted
b. The
water in the pipe cannot evaporate
c. They
contract in cold
d. The water in the pipe freezes into ice and expands
18.
A Sextant is used to measure:
a.
Height
of an object
b. Volume
of a building
c. Breadth
of a tower
d. Area of
a place
19. The
boiling point of water is not affected by:
a. The
external pressure
b. The
altitude at which water is boiled
c. The
amount of dissolved substances a
d. The temperature of the heat source
20. A pond
of clear water appears less deep than it really is. This is due to:
a. Reflection
b.
Refraction
c. The
transparency of water
d. Dispersion
No comments:
Post a Comment