Advertisements
Advertisements
प्रश्न
Give reasons for the following
Alchemy was considered a pseudoscience.
Advertisements
उत्तर
Towards the end of the 17th Century the scientific processes involving modem Chemistry started paving paths and Alchemy today is considered pseudoscience and Chemistry regain its rightful position as a serious scientific field.
संबंधित प्रश्न
What is science?
What is the main difference between alchemy and chemistry?
Who is known as the Father of chemistry? Why?
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.
Chemistry plays an important role in the national economy:
Choose the correct alternative from the choices given below for the following statement:
Trinitrotoluene is used as
State the method used for collecting the following gas-
Ammonia – a gas highly soluble in water and lighter than air
‘Alchemists are older words for Chemists’. Discuss the statement in brief.
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 rectangular mesh with asbestos at its centre kept for initiating even distribution of heat to the bottom of the apparatus.
