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प्रश्न
Differentiate between homogenous & heterogeneous mixtures.
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उत्तर
Difference between homogenous & heterogeneous mixtures :
Homogenous mixture :
- Their constituents are uniformly mixed.
- The properties and composition are the same throughout the mixture
- Two solids are Brass [Cu + Zn]
Heterogeneous mixture :
- Their constituents are not uniformly mixed.
- The properties and composition vary throughout the mixture.
- Two solids are Iron + sulphur
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संबंधित प्रश्न
Give one example for the following types of mixtures :
solid-liquid heterogenous mixture.
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Give two examples of the following.
Metals which are soft
Mention three gaseous elements and write their molecular formulae
Give reason: Argon is filled in electric bulbs.
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Match the Columns:
| Column A | Column B | ||
| (a) | Metals | (i) | Non-Reactive |
| (b) | Molecules | (ii) | Brittle |
| (c) | Non-Metals | (iii) | Lustrous |
| (d) | Noble Gases | (iv) | Smallest unit of Compound |
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
Select the correct answer from the choice given below.
The negatively charged particles in an atom
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
