1
Question
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.
Open in App
Solution
The correct option is D colour
Several observations indicate a chemical reaction has occurred. One is the formation of a precipitate. A precipitate is a solid formed in a chemical reaction that is different from either of the reactants.
A colour change may also indicate that a chemical reaction has occurred. A reaction has occurred if two solutions are mixed and there is a colour change that is not simply the result of dilution of one of the reactant solutions.
The formation of a gas is the third sign that a reaction may have occurred. The formation of bubbles when two liquids are mixed usually indicates that gas has formed.
An increase or decrease in temperature both indicate that a chemical reaction is occurring. Here the temperature increased when two liquid samples were mixed.
Hence, the correct option is D
Several observations indicate a chemical reaction has occurred. One is the formation of a precipitate. A precipitate is a solid formed in a chemical reaction that is different from either of the reactants.
A colour change may also indicate that a chemical reaction has occurred. A reaction has occurred if two solutions are mixed and there is a colour change that is not simply the result of dilution of one of the reactant solutions.
The formation of a gas is the third sign that a reaction may have occurred. The formation of bubbles when two liquids are mixed usually indicates that gas has formed.
An increase or decrease in temperature both indicate that a chemical reaction is occurring. Here the temperature increased when two liquid samples were mixed.
Hence, the correct option is D
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
