During an experiment, mr. lehman tells his students to be alert for signs that an endothermic reaction is happening. which of the following scenarios would his students most likely observe? -a test tube becomes cool to the touch -a liquid appears to glow -a new odor comes from a beaker -a solid forms from a mixture of solutions

Option (a) is the correct answer.

Explanation:

A reaction is endothermic reaction in which the reactant molecules absorb energy from the surrounding and no heat is released during the completion of reaction.

For example, melting of ice is an endothermic reaction.

Thus, we can conclude that out of the given options, a test tube becomes cool to the touch is the scenarios that his would students most likely observe.

idk what the question is about