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प्रश्न
Give two examples of Noble gases.
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उत्तर
Examples of Noble gases are Helium, argon, neon
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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 |
Name: a Metal Which is a Poor Conductor of Electricity.
Give two examples of the following.
Non-metals which are lustrous
Answer the following question:
When iron is mixed with sulphur at room temperature, it does not form a compound. Why?
Write the names of elements from the following symbol:
Xe
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Differentiate between homogenous & heterogeneous mixtures.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Water contains _____ and _____ element.
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
