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प्रश्न
Select the correct name from the choices given below for the following case.
A chemical used as a preservative for jams, pickles, etc.
पर्याय
Titanium dioxide
Rayon
Benzoic acid
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उत्तर
Benzoic acid
संबंधित प्रश्न
How is the knowledge of chemistry important to mankind?
What is the contribution of chemistry in the following field?
National Defence
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.
Enzymes secreted by our body are chemicals:
Choose the correct alternative from the choices given below for the following statement:
Used is an important
In the medieval ages – the philosopher’s stone was connected with all transformations. Explain.
Give a comparative difference between soaps and detergents. Give a reason. why detergents have an advantage over soap.
Select the correct name from the choices given below for the following case.
The branch of Science which deals with the different forms of energy e.g. light and sound.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A long glass apparatus closed at one end used for collecting gases.
Give reasons for the following
Alchemy was considered a pseudoscience.
