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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
विकल्प
it is dull
lustrous and attractive
highly reactive
very cheap
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उत्तर
lustrous and attractive
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संबंधित प्रश्न
Name the technique that you use if only the solid component of a solution is required.
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Define a pure substance. How many types of pure substances do you know?
Give three differences between metals and non-metals.
Give two examples of the following.
Metals which are soft
Give two examples of the following.
Elements which are liquids
Indicate whether the following statement is true or false:
A compound is made up of just one kind of atom
Give the name of the radical - CO3
Explain the difference between Metals and non-metals.
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 |
