Noble Gases

Q.

29. Give some uses of noble gases?

Q.

Name three inert gases.

Q.

All the rare gases have 8 electrons in their valency shell.

1. True
2. False

Q.

1. What are noble metals? Give examples.

2. Which element is considered as a reference in the metal reactivity series?

Q.

Write metal, non-metal, noble gas, or compound for the following:

(v) Argon

Q.

For noble gases, valency is :

1. One

2. Two

3. Three

4. Zero

Q. Assertion: The group 18 consists of elements which are in gaseous state under ordinary conditions
Reason: All the elements of group 18 has stable configuration

1. Both assertion and reason are true and reason is the correct explanation of assertion
2. Both assertion and reason are true but reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false