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प्रश्न
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
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उत्तर
संबंधित प्रश्न
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Marble
What are the advantages of chromatography?
Give two examples of Non-metals.
Define: Atom
Answer the following question:
When iron is mixed with sulphur at room temperature, it does not form a compound. Why?
Indicate whether the following statement is true or false:
Molecules combine to form atoms
Classify substances into pure and impure substances in the form of a chart or tabulation.
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
Water contains _____ and _____ element.
