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प्रश्न
Give reason: Graphite is used to make a lead of the pencils.
एका वाक्यात उत्तर
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उत्तर
Graphite leaves mark on the paper and makes it black.
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संबंधित प्रश्न
Name: a Metal Which is brittle
State the number of atoms of C6H12O6
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
Write the names of elements from the following symbol:
Zn
Give an example of two liquids that form heterogeneous mixtures.
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Differentiate metals and non-metals.
How are elements classified?
