set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following elements was first produced artificially?

a) Plutonium

b) Francium

c) Neptunium

d) Technetium

Question : 2

The rain drops are spherical because

a) The air has resistance

b) The water has surface tension

c) They fall from big height

d) None of the above

Question : 3

Two pieces of metal when immersed in a liquid have equal upthrust on them; then

a) both pieces must have equal densities

b) both pieces must have equal weights

c) both pieces must have equal volumes

d) both are floating to the same depth

Question : 4

An egg when placed in ordinary water sinks but floats when placed in brine. This is because

a) density of brine is equal to that of ordinary water

b) density of brine is less than that of ordinary water

c) density of brine is greater than that of ordinary water

d) None of these

Question : 5

Paint-gun is based on

a) Archemedes’ principle

b) Bernoulli’s theorem

c) Boyle’s law

d) Newton’s laws of motion

Question : 6

When a ship enters a sea from a river, what happens?

a) It remains at the same level

b) It sinks a little

c) It rises a little

d) It immersed in the bottom of the sea