Ask Question
7 July, 08:24

A chemistry teacher carried out several demonstrations, and students recorded their observations. For one of the demonstrations, a student concluded that a physical change took place, but not a chemical change. Which of the following observations could the student have made of the results of the demonstration?

+5
Answers (2)
  1. 7 July, 08:46
    0
    The given question is incomplete. The complete question is:

    A chemistry teacher carried out several demonstrations, and students recorded their observations. For one of the demonstrations, a student concluded that a physical change took place, but not a chemical change. Which of the following observations could the student have made of the results of the demonstration?

    a) Two colorless solutions were combined, and the resulting solution was pink.

    b) When a solid was added to a liquid, sparks were produced.

    c) One piece of solid substance was changed into small pieces.

    d) When two solutions were combined, a precipitate formed.

    Answer: One piece of solid substance was changed into small pieces.

    Explanation:

    Physical change is defined as the change in which shape and size of a substance changes, There is no change in the composition of the substance as no new substance is forming. It is usually an reversible reaction.

    Chemical change is defined as the change in which a change is the chemical composition takes place resulting in the formation of new substance. It is usually an irreversible reaction.

    Indicators showing chemical changes are:

    Color change

    Characteristic odor

    Formation of bubbles

    Formation of precipitate

    Thus the given change is a physical change as only the physical state i. e. size of solid substance was changed into small pieces.
  2. 7 July, 11:20
    0
    It demonstrates that it a physical change because you can't see nothing happening but something happening

    Sry if it doesn't make sense
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “A chemistry teacher carried out several demonstrations, and students recorded their observations. For one of the demonstrations, a student ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers