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प्रश्न
Match the following.
| 1. | Element | Made up of molecules |
| 2. | Compound | Impure substance |
| 3. | Colloid | Settles down on standing |
| 4. | Suspension | Pure substance |
| 5. | Mixture | Made up of atoms |
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उत्तर
| 1. | Element | Pure substance |
| 2. | Compound | Made up of atoms |
| 3. | Colloid | Made up of molecules |
| 4. | Suspension | Settles down on standing |
| 5. | Mixture | Impure substance |
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संबंधित प्रश्न
Write true or false
All pure substances have characteristic melting and boiling points.
Define a pure substance. How many types of pure substances do you know?
Give two examples of Metalloids.
Name A substance used as an insulator.
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Write an answer to the following question in your own words.
Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
