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प्रश्न
State the function of
The wooden handle at the end of the test tube holder.
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उत्तर
The wooden handle at the end of the test tube being a poor conductor of heat makes holding the test tube holder easy.
संबंधित प्रश्न
Write True or False against the following statement.
Enzymes secreted by our body are chemicals:
Match the following scientists in column A with their discoveries or contributions in column B.
| Column A | Column B | ||
| (a) | Marie Curie | (i) | Safety Lamp |
| (b) | John dalton | (ii) | Helium |
| (c) | William Ramsey | (iii) | Nobel Prize Winner (two times) |
| (d) | Sir Humphry Davy | (iv) | Atomic Theory |
State the functions of the following basic glass apparatus:
Retort
State the function of The tap at the base of a burette.
State the method used for collecting the following gas:
Oxygen – a gas slightly soluble in water.
Select the correct name from the choices given below for the following case.
Predecessors to the modern Chemist who created the ‘Philosopher's stone’.
Select the correct name from the choices given below for the following case.
A water-soluble cleaning agent – not inactivated by hard water.
Select the correct name from the choices given below for the following case.
A chemical used as a preservative for jams, pickles, etc.
Select the correct name from the choices given below for the following case.
A substance which dissolves grease & oil and is preferred as a – drain cleaner.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A glass apparatus resistant to chemicals, made of pyrex, and used for heating specific liquids.
