Uses of Helium

Q.

11. Which gas is used to fill balloons?

1. Helium

2. Carbon

3. Hydrogen

4. None of these

Q.

What is the rarest gas on Earth?

Q.

Why noble gas elements are called rare elements?

Q.

Why are inert gases called so?

Q. Helium is used in gas balloons instead of hydrogen because -

1. It is lighter than $H_2$
2. It is non-combustible
3. It is more abundant than $H_2$
4. Its leakage can be detected easily

Q.

Helium is preferred to hydrogen for filling balloons because it is non-combustible

1. True
2. False

Q.

Name three noble gases present in the air. State their one industrial use.

Q. Assertion :Oxygen is the most abundant element on the surface of earth. Reason: Oxygen is paramagnetic with double bond character.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. The inert gas which cannot be adsorbed over activated coconut charcoal?

1. Ar
2. Ne
3. He
4. Kr

Q. Helium is used:

1. In gas-cooled nuclear reactors
2. In discharge tubes and fluorescent bulbs for advertisement display purposes
3. In NMR spectrometers and MRI systems
4. As a diluent for oxygen in modern diving apparatus