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प्रश्न
Classify substances into pure and impure substances in the form of a chart or tabulation.
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उत्तर
संबंधित प्रश्न
Define: Elements
Write true or false
All pure substances have characteristic melting and boiling points.
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 |
Is food that we eat a mixture ?
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Indicate whether the following statement is true or false:
Noble gases are high reactive
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Select the correct answer from A, B, C, D & E for the statement given below :
A noble gas.
An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?
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.
