Rajasthan Police Constable Model Paper 8

Question : 69 of 150

Marks: +1, -0

Acids react with metals to release which of the following gases?

Solution:

Acids react with metals to release hydrogen gas.
When an acid reacts with metal, a salt and hydrogen gas are produced.
Metal + Acid → Salt + Hydrogen
It doesn't matter which metal or which acid is used if there is a reaction we always get hydrogen gas as well as the salt.
However, how quickly the reaction goes depends on the metal used and how high up in the reactivity series it is.
Ex:- Zn(s) + 2HCl (aq) → $ZnCl_2(aq) + H_2$ g)

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