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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
विकल्प
neon and argon
hydrogen and helium
aluminium and copper
oxygen and nitrogen
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उत्तर
hydrogen and helium
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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 the technique that you use if only the solid component of a solution is required.
Name: Three different forms of carbon
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Write the names of elements from the following symbol:
Zn
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 |
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
Why are utensils made up of aluminium and brass?
Classify the substances given in Fig. 2.2 into elements and compounds
Higher-Order Thinking questions:
Why is hydrogen considered an element?
