Question

Which gas is produced during the reaction of base with metals?
A. Dihydrogen
B. Dioxygen
C. Carbon dioxide
D. Dinitrogen

Answer 1

Hint: we know that nitrogen gas and dinitrogen are the same . Similarly dioxygen and oxygen are the same , dihydrogen and hydrogen gas are the same . Bases are bitter in taste and feel soapy when touched. Metals have very low electronegativity and don’t tend to accept electrons.

Completes step by step answer:
We already know that all base have a hydroxide group ( $OH$) . When we dissolve a base in water we call it a alkali . So whenever a base reacts with a metal it produces a salt and releases hydrogen gas. We can write the chemical equation as $metal + base \to salt + hydrogen \uparrow $. Some of the example of bases are $KOH,NaOH,N{H_4}OH$. We will try to understand it with some examples . When sodium hydroxide reacts with zinc , sodium zincate is formed along with hydrogen gas . The chemical equation can be written as
$Zn + NaOH \to N{a_2}Zn{O_2} + {H_2} \uparrow $ .
When aluminium reacts with sodium hydroxide , sodium meta aluminate is formed along with hydrogen gas. The chemical reaction can be written as $Al + NaOH \to NaAl{O_2} + {H_2} \uparrow $ . We can see form these examples that hydrogen gas is been released . Dioxygen, carbon dioxide or nitrogen have not been released . So from the above explanation and examples it is clear to us that

The correct answer of the given question is : option A. Dihydrogen .

Note:
Always remember that when metal reacts with a base , salt is produced along with hydrogen gas. The chemical reaction can be simply written as $metal + base \to salt + hydrogen \uparrow $ .Whenever the experiment is performed in a test tube , it burns with a pop sound when a burning candle is brought near the mouth of the test tube.