Question

In the reaction 2K + 2H2O→2KOH + H2 , which compound has an element ratio of 2:1 ?

Answer 1

Answer:

Option O = H₂O

Explanation:

Chemical reaction:

2K + 2H₂O   →     2KOH + H₂

In this balanced chemical equation we can see that water is the only compound that consist of two hydrogen atom and one oxygen atom. H : O

2 : 1 .

In case of KOH two hydroxyl and two potassium atom are present and ration is K:OH  1:1.

Answer 2

Answer: Option (c) is the correct answer.

Explanation:

A compound is defined as the substance in which different elements are chemically combine together in a fixed ratio by mass.

For example, $H_{2}O$ and KOH are both compounds in the given reaction equation.

Here, in $H_{2}O$ the atoms are present in 2:1 ratio and in KOH compound the atoms are present in 1:1 ratio.

A compound can be divided into its constituent or simpler substances.

Thus, we can conclude that in the given reaction only $H_{2}O$ is the compound which has an element ratio of 2:1.