Question

Active metal + acid = salt + hydrogen gas , example

Answer 1

Topic -

Reaction of Acids & Bases

Solution

$\sf{ ⚘Active \: metal + acid \to salt + hydrogen \: gas }$

Example-

$\mathtt{ \red{Mg+2HCl\to MgCl_2 +H_2}}$

• Active metal = Mg (magnesium)
• HCl = Acid (hydrochloride acid )

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More to know!!

$\sf{◎ \: acid +base\to Salt+Water}$

$\sf{◎ \: Acid+ carbonate\to Salt+water+Carbon \: dioxide}$

$\sf{◎ \: Acid + sulphide\to salt+hydrogen \: sulphide}$

Answer 2

Example:

$Zn (s) + H_2SO_4 \rightarrow ZnSO_4 (s) + H_2 \uparrow (g)$.

Reaction of Zinc metal with Sulphuric Acid yields Zinc Sulphate and Hydrogen gas evolved.

More:

Given reaction is an example of displacement reaction, and intermolecular redox reaction.