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प्रश्न
Explain the term ‘mixture’.
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उत्तर
Mixture: A mixture is made up of two or more substances elements or compounds or both mechanically mixed together in any proportion. A mixture retains the properties of its constituent elements or compounds.
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संबंधित प्रश्न
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Name: Two substances used to make electric wires
Give reason: Argon is filled in electric bulbs.
Elements are classified into – Metals – Non-metals – Metalloids – Noble gases. State which of A, B, C, D is a –
1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.
A: Is non-malleable, non-ductile & a poor conductor of electricity ___________
B: Has lustre, is malleable and ductile & a good conductor of heat ___________
C: Is unreactive and inert and present in traces in the air _________
D: Shows properties of both metals and non-metals ___________
Define the terms elements, compounds & mixtures with a view to show their basic difference.
State five different characteristics of compounds.
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 |
Elements are made up of______ kinds of atoms.
Differentiate metals and non-metals.
Reason out
Elements are called semimetals.
