Consider the following statements with reference to X-rays:

1. They produce heat when absorbed by matter.
2. They are generated when fast making electrons strike a metal target.
3. They can penetrate through a thin sheet of aluminum.

Which of the statements given above are correct?

Which one of the following statements is correct?
A slab of ice kept in a room

Consider the following statements:
The fog during winter season is more on the day when
1. sky is clear.
2. sky is cloudy.
3. wind is blowing.
Which of the statements given above is/are correct?

Which of the following is the correct sequence of the regions of sun as one moves from its core to the surface?
1. Photosphere
2. Chromospheres
3. Convection zone
4. Corona
Choose the Correct Option:

What is the correct ascending order for frequencies of the following radiations?
1. Visible
2. X-rays
3. Ultraviolet
4. Radio waves
Choose the Correct Option:

Which of the following is good nuclear fuel?

Optic Fibres are used for which of the following?

Cryogenic engines find applications in

In a refrigerator cooling is produced by

The following processes take place during the launching of a rocket
1. Rocket fuel is burnt
2. Gases are produced
3. Rocket moves in the forward direction
4. Gases come out with momentum in backward direction
The correct sequential order in which the above processes occur is