Question

What happens in a single replacement reaction apex?

Answer 1

The Single Replacement Reaction is a type of chemical reaction that occurs when one element replaces another in a compound. An example of this reaction is when potassium (K) reacts with water (H2O), it formed a colorless solid compound named potassium hydroxide (KOH), and hydrogen gas (H2) is set free.

Answer 2

Answer: The more reactive element replaces lesser reactive one

Explanation:

Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.

A more reactive element is one which can easily lose or gain electrons as compared to the other element.

Example: $Zn+2HCl\rightarrow ZnCl_2+H_2$

Here Zinc being more reactive than hydrogen can easily displace hydrogen from its salt solution and form zinc chloride and hydrogen in elemental form.