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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
विकल्प
the same physical state
the same colour
the same composition
a definite set of properties
MCQ
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उत्तर
a definite set of properties
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संबंधित प्रश्न
Give two examples for the following: Metals
State four differences between compounds and mixtures.
Give two applications of chromatography.
Give two examples of Non-metals.
What is meant by 2H and H2
Name A substance used as an insulator.
Indicate whether the following statement is true or false:
Metals can be polished.
Match the separation of components in List I with the most appropriate process in List II.
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | A: Separating funnel |
| 2. Cream from milk. | B: Sublimation |
| 3. Kerosene oil from kerosene oil & water. | C: Boiling |
| 4. Lead nitrate from an aqueous solution of lead nitrate. | D: Centrifugation |
| 5. Ammonia from an aqueous solution of ammonia. | E: Distillation |
What are elements? What are they made of?
Differentiate between elements and compounds.
