Question Detail

What is the range of mercury thermometer ?

0 degree Celsius to 350 degree Celsius
-10 degree Celsius to 350 degree Celsius
-20 degree Celsius to 350 degree Celsius
-30 degree Celsius to 350 degree Celsius

Answer: Option D

1. Atom is the smallest part of matter which takes part in chemical reactions.

True
False

Answer: Option A

2. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called

Nuclear fusion
Nuclear fission
Nuclear reaction
Fast breeding

Answer: Option B

3. Harry Brearley has invented

Electric iron
Electromagent
Stainless Steel
Gramophone

Answer: Option C

Explanation:

Harry Brearley of England has invented Stainless Steel in 1913,

Electric iron has been invented by H.W. Seeley of USA in 1882,

Electromagent has been invented by W.Sturgeon of England in 1824,

Gramophone has been invented by T.A. Edison of USA in 1878.

4. What is displacement ?

Longest distance covered by a body in a random direction.
Shortest distance covered by a body in a random direction.
Shortest distance covered by a body in a definite direction.
Longest distance covered by a body in a definite direction.

Answer: Option C

5. Which instrument is used in submarine to see the objects above sea level ?

Pykometer
Polygraph
Photometer
Periscope

Answer: Option D

Explanation:

Pykometer - used to determine the density and coefficient of expansion of liquids,

Polygraph - used to record changes in heartbeat, blood-pressure and respiration,

Photometer - used to compare luminous intensity of the source of light.