When calcium (ca) is mixed with hydrochloric acid (hci), a single-displacement reaction occurs. what will be the product or products? a) caci2 b) caci2+h2 c) ca+hci d) ci and h

The correct answer is Option b.

Explanation:

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.

The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series.

When calcium metal reacts with hydrochloric acid, it leads to the formation of a salt known as calcium chloride and also releases hydrogen gas.

The chemical equation for the above reaction follows:

Hence, the correct answer is Option b.