Question

Fill in the blanks:-

1.Addition of hydrogen in a substance in a reaction is known as___________ reaction.

2.In a ________ reaction two or more substances combine to form a new single substance.

3.Unbalanced reactions are also known as _________

4.Reactions in which heat is given out along with the products are called _________- reactions.

5.Reactions in which energy is absorbed are known as _________ reactions.

6.When as element displaces another element from its compound, a ________ reaction occurs.

7.Those reactions, in which two compounds react by an exchange of ions to form two new compounds, are called ________ reactions

8.Precipitation reactions produce __________ salts.

9.Reduction is the _________ of oxygen or gain of hydrogen.

10.The digestion of food in the body is an example of ____________ reaction.

11.The addition of oxygen to a substance is called __________.

12.When calcium carbonate is heated, it decomposes to give___________ and _________.​

Answer 1

Answer:

1. Reduction

2. Synthesis

3. Skeletal

4.Exothermic

5. Endothermic

6. Displacement

7. Double Displacement

8. Insolube

9. reduction

10. decomposition (chemical)

11. Oxidation

12. carbon dioxide calcium oxide

Explanation:

hope you find it useful

Answer 2

Answer:

1. reduction

2. combine

3.skeltal

4.exothermic

5.endothermic

6.displacement

7.double displacement

8.precipitate of

9.lose

10.combustion

11.oxidation

12.CaO, CO2