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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.

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peridorito8864
B is the answer, that's describing a double replacement reaction, where the cations and anions switch.

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Answer: 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, [tex]2HCl + Zn \rightarrow ZnCl_{2} + H_{2}(g)[/tex]

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.

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