# Mechanics and Properties of Matter TNPSC Group 1 Questions

## Mechanics and Properties of Matter MCQ Questions

13.
A swimmer finds it easier to swim in sea water than in plain water. Why?
A.
sea water has less contamination
B.
sea waves help a swimmer to swim
C.
sea water has higher density than plain water
D.
sea has a much higher volume of water
C. sea water has higher density than plain water
14.
why do we see bubbles coming out when a brick is immersed in water?
A.
air trapped inside the brick comes out
B.
the density of brick is greater than the density of water
C.
the density of brick is lesser than the density of water
D.
the water displaced by the brick evaporates fast
A. air trapped inside the brick comes out
15.

At 0o C the density of ice 0.96 of water. If 1 Cu.m. of water is solidified at 0oC. We can infer:

i) Density of all liquids are higher when solidified;

ii) Ice will float at 0o C in water, half-submerged and a half above the surface of the water;

iii) when solidified water expands.

A.

only (i)

B.

only (ii)

C.

only (iii)

D.

(i) and (iii)

C. only (iii)

16.
the blood circulation in muscle is due to
A.
thin density of blood
B.
viscosity of blood
C.
capillary action
D.
absorption
C. capillary action
17.
Density of mercury is __________ times the density of water
A.
2.4
B.
1.36
C.
13.6
D.
6.31