Who gave the first evidence of the big-bang theory? *
1 point
Why is it difficult to see through the fog? *
1 point
A ray of light is incident on a plane mirror at an angle 30° with the normal at the point of incidence. The ray will be deviated from its incidence direction by what angle? *
1 point
Assertion (A): In a pressure cooker food is cooked above boiling point. Reason (R): Boiling point of water increases as the pressure increases. *
1 point
What would be the best choice for window material to keep the outside heat away? *
1 point
Assertion (A): Steam is more harmful to the human body than boiling water in case of a burn. Reason (R): Boiling water contains more heat than steam. *
1 point
On which one of the following conservative laws, does a rocket work? *
1 point
The density of water varies with temperature which helps the aquatic animals to live in cold water. At what temperature is the density of water maximum? *
1 point
Which one of the following Indian scientists was elected as a fellow of the Royal Society of London for his contribution in the field of plant Physiology and Physics? *