Ask Question
25 September, 00:38

Which is considered an indication that a chemical reaction or chemical change has taken place A:solid melts B: heat is given off C: substance dissolves D: Substance change shape

+3
Answers (1)
  1. 25 September, 04:05
    0
    B: heat is given off C:

    Explanation:

    Physical Change

    The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.

    These changes were reversible.

    They have same chemical property.

    These changes can be observed with naked eye.

    Example:

    Water converting to Ice

    Water converting to gas

    Chemical change:

    The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

    These changes are irreversible

    These changes occur due to chemical reactions

    These may not be observed with naked eye

    Example:

    Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

    So in given data the heat is given off indicate the chemical change while others

    Solid melts

    Substance dissolve

    Substance change shapes are physical changes because no new product is obtained there is no indication of chemical reaction.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Which is considered an indication that a chemical reaction or chemical change has taken place A:solid melts B: heat is given off C: ...” 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