Which of the following is false regarding to single replacement reactions? a.) metals and halogens can be sequenced according to their total reactivity. b.) in a single replacement reaction, positive ions replace positive ions and negative ions replace negative ions. c.) single replacement reactions occur when atoms of one element replace the atoms of another element in a compound. d.) in a single replacement reaction of a compound, elements lower in the activity series can replace elements higher in the series.

Option (d) is the correct answer.

Explanation:

A single replacement reaction is defined as the reaction in which there will be displacement of one type of atom from a compound by another atom.

Generally, an element with higher reactivity is able to replace the element of lower reactivity.

For example,

So, here Zn being more reactive is able to displace hydrogen atom from HCl.

Thus, we can conclude that the statement in a single replacement reaction of a compound, elements lower in the activity series can replace elements higher in the series, is false.