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प्रश्न
In the medieval ages – the philosopher’s stone was connected with all transformations. Explain.
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उत्तर
In the medieval ages to the 17th Century, the so-called philosopher’s stone – held priority and alchemists were successful to a certain extent, in the development of processes, which helped later chemists to extract metals and develop – path-breaking avenues in Chemistry. The scientific process involving modern chemistry started paving paths and chemistry regains its rightful position.
The Scientific Process involving Modern Chemistry started paving paths & chemistry regains its rightful position.
संबंधित प्रश्न
What is science?
What is alchemy?
How is the knowledge of chemistry important to mankind?
Choose the correct alternative from the choices given below for the following statement:
Which one of the following is a pesticide?
State the function of
The wooden handle at the end of the test tube holder.
State the function of
The clamp mounted on the rod of a retort stand
Match the apparatus A to J shown below with their correct names 1 to 10 given below:

1. Delivery Tube
2. Pipette
3. Wire gauze
4. Bee-hive shelf
5. Thistle funnel
6. Flat bottom flask
7. Test tube stand
8. Burette
9. Retort
10. Conical flask
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.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A metallic apparatus which supports the wire gauze.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A long glass tube with a broad inlet at the top, which allows entry of the reactants into the round bottom flask, during laboratory preparations of gases.
