Question

7.
C. Write true or false. Correct the false statements.
1. New substances that are produced as a result of a reaction are called reactants.___
2. When acetic acid is added to sodium bicarbonate, brisk effervescence takes place.___
3. Copper(II) sulphide is blue in colour.____
4. A chemical reaction in which heat is absorbed is called an exothermic reaction.___
5. Chemical reactions that need energy in the form of electricity to take place are called
electrochemical reactions.
6. An enzyme is a substance___ that acts as a catalyst in living organisms.___​

Answer 1

Answer:

1) false.

2) idk

3) idk

4) false

5) true

6) idk

hope it helps you

Answer 2

Explanation:

is this 10th class question??