Your lab partner mixed two colorless solutions in the test tube. He sees no observable changes in the resulting mixture and is unable to detect any change in temperature. Based on these observations, what type of reaction has taken place?
D
No reaction has taken place
Correct option is A. A physical reaction
No change in temperature $$-$$ neither exothermic or endothermic reaction.
as no observable change $$-$$ not a chemical reaction
since the liquid mixed $$-$$ it is a physical change.