Which of the following is false regarding single replacement reactions?

Metals and halogens can be sequenced according to their total reactivity.
In a single replacement reaction, positive ions replace positive ions and negative ions replace negative ions.
Single replacement reactions occur when atoms of one element replace the atoms of another element in a compound.
In a single replacement reaction of a compound, elements lower in the activity series can replace elements higher in the series.

Question

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

superhelp101 · Answer

@ikram002p @Jessica47 @Jaimelys13 @jlg030597 @Whitemonsterbunny17 @e.mccormick

whitemonsterbunny17 · Answer

I'm sorry, but I am not familiar with any Chemistry yet, but maybe @Somy can help. (:

superhelp101 · Answer

that is fine

aaronq · Answer

you should approach these questions with an elimination-type of process. Eliminate options that you know are incorrect.

somy · Answer

hmm any guesses?

abmon98 · Answer

a single element replaces a second element in a compound.
A+BX-->AX+B
Cation Replacement:
Zn+CuCl2-->Cu+ZnCl2
Anion Replacement
Br2+2KI-->KBr+I2
Less Reactive elements cannot replace more reactive element.

superhelp101 · Answer

thank you!

abmon98 · Answer

your welcome :D