Materials and Components

Assertion (A): Helium, Argon and Neon are gaseous at room temperature. Reason (R): The atoms in Helium, Argon and Neon are chemically extremely inactive.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true but R is false

D A is false but R is true

ANS:A - Both A and R are true and R is correct explanation of A

Since they have complete octet, so they don't react except under special conditions. So at room temperature they are chemically inactive and hence they don't form any compound at 300 K. So, they remain in their original gaseous state.

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