Question

the following is called permanent gas (a) NH3 (b) N2 (c) H2 (d) Co2​

Answer 1

Answer:

H2 is called permanent gas

Explanation:

Reason is that H2 cannot be liquified , so it remain gas , thats why it is called permanent gas .

But H2 , N2 and Co are all permanent gases

Answer 2

The correct option is c.

• The gas which can not be liquified or compressed is called permanent gas.
• Hydrogen gas can not be compressed or liquified so, it is a permanent gas.
• Nitrogen, ammonia and carbon dioxide can be compressed and liquified by applying certain conditions. So, these gases are not permanent gas.
• Thus hydrogen is permanent gas.