1.
Chalk, limestone, marble, eggshells and seashells are made of

2.
The conservation of mass is obtained when the total mass of reactants is equal to total mass of

3.
Chemical changes are

4.
If baking soda or fruit salt is mixed with vinegar, there takes place a

5.
Burning of fossils fuel results in the production of

6.
At room temperature iron and sulphur

7.
If both water and carbon dioxide is given to plant it will not be able to prepare its own food in absence of

8.
Melting, freezing, boiling, evaporation and condensation are all

9.
Chemical change involves the formation of

10.
The change which is not accompanied by formation of new substance is called a

Read More Section(Science Mcqs)

Each Section contains maximum 70 questions. To get more questions visit other sections.