Question

Metals react with acids to produce -------------- gas

Answer 1

Hydrogen gas.........

Answer 2

Hi friend,

Here is your answer,
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Metals react with acids to produce H₂ (Hydrogen) gas.

For example- 

   Zn     +   2HCl   ------------>   ZnCl₂  +           H₂
(Metal)     (Acid)                      (Salt)      (Hydrogen gas)
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