Tiffany, Isaac, and Riley wanted to demonstrate their knowledge of chemical reactions. So, Tiffany and Isaac sat on a bench together. Riley asked Isaac to get up and leave the bench, then sat in his place. Which type of chemical reaction does this demonstrate?

Question

Tiffany, Isaac, and Riley wanted to demonstrate their knowledge of chemical reactions. So, Tiffany and Isaac sat on a bench together. Riley asked Isaac to get up and leave the bench, then sat in his place. Which type of chemical reaction does this demonstrate? 
Single replacement
Acid-base reaction
Decomposition reaction
Double replacement

Tessa · Accepted Answer

I think it's the first one but I'm not sure.

DrBob222 · Answer

yes. Single replacement. A + BC ==> AC + B

cindy · Answer

thank you both