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प्रश्न
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
उत्तर
BRASS is HOMOGENOUS because the mixture is just the same throughout and its constituents cannot be distinguished from each other i.e. composition is the same throughout.
Whereas in Heterogenous mixture of iron and sulphur, the constituents. It can be separated easily by a magnet, the particles can be distinguished from each other and composition is not uniform.
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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 |
How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.
Give one use of the following substance:
Coal
Indicate whether the following statement is true or false:
A compound is made up of just one kind of atom
Tick (√) the correct alternative from the choice given for the following statement.
Sulphur and carbon are
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Differentiate between the terms –
elements, compounds & mixtures.
Select the correct answer from the choice given below.
The negatively charged particles in an atom
State four differences between – elements, compounds and mixtures with suitable examples.
Name the element which is used for making computer chips.
