set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Why do two ice blocks join to form one block when pressed together?

a) Melting point of ice remains unchanged with increase in pressure

b) Melting point of ice increases with increase in pressure

c) Melting point of ice is lowered with increase in pressure

d) Melting point of ice is 0°C

Question : 2

If the moon is to escape from the gravitational field of the earth forever, it will require a velocity

a) slightly more than 111.2 km/s

b) less than

c) 11.2 km/s

d) 22.4 km/s

Question : 3

Raw mangoes shrivel when pickled in brine. The phenomenon is associated with

a) increase of surface tension of fluid

b) reverse osmosis

c) osmosis

d) decrease of surface tension of fluid

Question : 4

Two objects of different masses falling freely near the surface of moon would

a) experience forces of same magnitude

b) have different accelerations

c) have same velocities at any instant

d) undergo a change in their inertia

Question : 5

Flow velocities in an incompressible fluid can be measured with which one of the following?

a) Strain gauge

b) Venturi tube

c) Barometer

d) Manometer

Question : 6

A spring balance is graduated on sea level. A body of mass 1 kg is weighed at consecutively increasing heights from the earth’s surface, then what would be the weight indicated by the balance?

a) Weight will remain same

b) Weight will go on decreasing continuously

c) Weight will go on increasing continuously

d) Weight will first increase and then decreases