Question

Multiple choice questions
Question 1. Maharishi Kanada considered matter to be made up of tiny particles which he called *
1 point
anu
manu
nu
Question 2. Molecules are in constant *
1 point
motion
rest
none of the above
Question 3. Adhesives have strong molecular forces of *
1 point
repulsion
attraction
all the above
Question 4. The temperature at which a liquid changes into solid without further decrease in temperature is called *
1 point
freezing point of the liquid
boiling point
condensation point
Question 5. A liquid can change into vapour state *
1 point
at a fixed temperature
at all temperatures
all the above
Question 6. The side opening near the mouth of an Eureka can is *
1 point
pipe
pouch
spout
Question 7. Density bottle measures the____________ of a liquid. *
1 point
density
relative density
mass
Question 8. Specific gravity usually means relative density with respect to __________. *
1 point
water
sugar syrup
petrol
Question 9. The weight of a body floating in a liquid is _________. *
1 point
zero
10
100
Question 10. The buoyant force experienced by a body when floating in salt-water is _______ that when floating in pure water. *
1 point
more than
less than
equal to
Question 11. The density of liquid ___________ with increase in its temperature. *
1 point
increases
decreases
doesn't change
Question 12. Relative density of water is *
1 point
1
2
0
Question 13. For a floating body, how is its weight related to the buoyant force? *
1 point
buoyant force is more than weight
buoyant force is less than weight
buoyant force is equal to the weight
Question 14. Why is it easier to lift a stone under water than in air? *
1 point
water exerts buoyant force
stone exerts buoyant force
density of stone is more than water
Question 15. _________ is a water-tight boat which can travel under water like a ship . *
1 point
An iron ship
An aeroplane
Submarines
Question 16. Higher we go, ____________ is the air pressure. *
1 point
greater
lesser
equal to
Question 17. Gases exert pressure in ________ directions. *
1 point
upward
downward
all
Question 18. The S.I. unit of pressure is _______. *
1 point
kg
newton
pascal
Question 19. The pressure on a surface increases with an increase in the ________ on the surface. *
1 point
volume
area
thrust
Question 20. Less force is needed when applied at a ________ distance from the pivoted point. *
1 point
farther
nearer
none of the above
Question 21. 1 kgf = ___________ N *
1 point
10
100
1000
Question 22. Heat produces *
1 point
change in temperature of the body.
change in state of the body.
all the above.
Question 23. Thrust is the _______ force acting on a surface. *
1 point
perpendicular
normal
all the above
Question 24. S.I. unit of moment of force is ________. *
1 point
N
kgf m
Newton-metre
Question 25. The feet of lizards act like _______. *
1 point
moving pads
drilling pads
suction pads
Question 26. Pressure exerted by a liquid is due to its ____________. *
1 point
weight
mass
volume
Question 27. Pressure inside a liquid increases with _________. *
1 point
increase in depth
decrease in depth
decrease in density
Question 28. The atmospheric pressure at the sea level is nearly ________. *
1 point
10 Pa
100 Pa
1000 Pa
Question 29. A man exert more pressure on the floor *
1 point
while standing
while walking
while sleeping
Question 30. State true or false - 'A coolie does no work against the force of gravity while carrying a luggage on a plane road'. *
1 point
true
false
none of the above
Question 31. The energy of a flying kite is *
1 point
kinetic energy
potential energy
none of the above
Question 32. Work is said to be done by a force only when the body _______. *
1 point
moves
stops
none of the above
Question 33. The S.I. unit of energy is _________. *
1 point
newton
joule
watt
Question 34. 1 H.P. = ________ W *
1 point
746 watts
256 watts
300 watts
Question 35. When a boy doubles his speed, his kinetic energy becomes __________. *
1 point
half
double
four times
Question 36. The moon is revolving around the earth in a circular path. How much work is done by the moon? *
1 point
2
3
0
Question 37. Name the form of energy stored in a wound up spring of a watch. *
1 point
kinetic energy
elastic potential energy
none of the above
Question 38. A boy lifts a luggage from height 2 m to 4 m. The potential energy will become *
1 point
half
one-third
double
Question 39. Boiling occurs at ___________. *
1 point
a fixed temperature.
all temperature.
none of the above
Question 40. The molecules of liquid _______ heat from surroundings in evaporation. *
1 point
absorb
release
all the above

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Answer 1

Answer:

Explanation:

2] The temperature near the sea level is higher.