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प्रश्न
Define: Compounds
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उत्तर
Compounds are pure substances composed of two or more elements in definite proportion by mass and has properties, entirely different from those of its constituents elements.
Compound, are made up of different types of atoms combined chemically.
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संबंधित प्रश्न
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture
Give one example for the following types of mixtures :
misicible liquids
Give reason: Argon is filled in electric bulbs.
Indicate whether the following statement is true or false:
All elements are artificially prepared
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Tick (√) the correct alternative from the choice given for the following statement.
Atoms of different kinds combine to form molecules of
Tick (√) the correct alternative from the choice given for the following statement
A metal which is brittle
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Select the correct answer from A, B, C, D & E for the statement given below :
A noble gas.
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 |
