1. Water boiling into water vapour is an example of chemical change. 2. Chemist identify gypsum as a natural indicator.

Question

True or False. If False, give the correct statement:

1. Water boiling into water vapour is an example of chemical change.

2. Chemist identify gypsum as a natural indicator.

3. The water we drink is the combination of hydrogen and oxygen.

4. When we soak onion in water, then the irritation is increased

5. Mortar is a paste of cement and sand mixed with water

6. Fertilizers containing only plant or animal based materials or those synthesized by microorganisms are called inorganic fertilizers.

7. ‘Portland’ cement resembled the high-quality building stones found in Portland, England.

8. Reinforced Cement Concrete is a mixture of cement, sand and gravel.

9. Gypsum is used in the process of making cement.

Answer 1

1. False. Water boiling into water vapour is an example of Physical change.

2. False. Chemist identify turmeric powder as a natural indicator.

3. True

4. False. When we soak onion in water then the irritation is reduced.

5. True

6. False. Fertilizers containing only plant or animal based materials or those synthesized by microorganisms are called organic fertilizers,

7. True

8. False. Concrete js a mixture of cement, sand and gravel.

9. True

10. False. Epsom js usecj jn improving plant growth in agriculture.