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प्रश्न
‘Alchemists are older words for Chemists’. Discuss the statement in brief.
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उत्तर
Alchemy and alchemists are older words for Chemistry and chemists where –alchemists transformed or created substances through a seemingly – magical process. An alchemist Nicolas Flamel claimed to transform metals into gold.
संबंधित प्रश्न
___________ deals with the study of matter and the changes it undergoes.
Choose the correct alternative from the choices given below for the following statement:
Trinitrotoluene is used as
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 function of
The wooden handle at the end of the test tube holder.
State the function of
The air regulator in a Bunsen burner.
State the function of The tap at the base of a burette.
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 name from the choices given below for the following case.
A chemical used as a preservative for jams, pickles, etc.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
For holding washed test tubes
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A rectangular mesh with asbestos at its centre kept for initiating even distribution of heat to the bottom of the apparatus.
