Question

Generally gas 'G' is evolved when reactive metals react with dilute acids. Gas 'G' burns with a pop sound. Gas 'G' is

• A.
  $H_2$
• B.
  $O_2$
• C.
  
  $C{O}_2$
• D.
  
  $CO$

Answer 1

The correct option is A

$H_2$
Metals react with dilute acids to form a salt and liberate hydrogen gas $\left(H_2\right)$. Hydrogen gas burns with a pop sound when a burning candle is brought near the mouth of the test tube containing the reaction mixture.

Hence, the correct answer is option (a).