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प्रश्न
State the function of
The air regulator in a Bunsen burner.
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उत्तर
The air regulator has holes and is used for regulating the flame.
संबंधित प्रश्न
What is ‘Philosopher’s stone’?
How is the knowledge of chemistry important to mankind?
Match the following words in column A with those in column B:
| Column A | Column B | ||
| (a) | Clothing | (i) | toothpaste, cosmetics |
| (b) | Green Revolution | (ii) | nylon, wool |
| (c) | Building Material | (iii) | agriculture |
| (d) | Commodities of daily | (iv) | mortar, cement |
Write True or False against the following statement.
Gunpowder is an insecticide:
Write True or False against the following statement.
Enzymes secreted by our body are chemicals:
State the functions of the following basic glass apparatus:
Beaker
State why a round bottom flask is preferred to a flat bottom flask – during the preparation of gases in the laboratory.
Select the correct name from the choices given below for the following case.
A Medicine to treat pain, fever & inflammation.
Select the correct name from the choices given below for the following case.
A substance which absorbs moisture and keeps the skin dry and free from rashes.
Select the correct name from the choices given below for the following case.
A chemical used as a preservative for jams, pickles, etc.
