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प्रश्न
Which non-metal is essential for our life and all living beings?
उत्तर
Oxygen is essential for our life and all living beings inhale it during breathing.
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संबंधित प्रश्न
Give an example of a metal which is a poor conductor of heat.
Can you store lemon pickle in an aluminium utensil? Explain.
Which property of copper and aluminium makes them suitable for making electric wires?
Name a metal which is so soft that it can be cut with a knife.
Name a non-metal having lustre (shining surface).
Write ‘True’ or ‘False’ in front of following statement.
Stainless steel is used for making power transmission wires.
`N+—→ N^3-`
The table below compares some properties of metals and non-metals. Write down the missing
statements (i) to (iv) :
| Metals | Non-metals |
| (i) ………………….. | Poor conductors of heat |
| (ii) Malleable | …………………… |
| (iii) Form positive ions | …………………… |
| (iv) ………………… | Form acidic oxides |
Distinguish between a mineral and an ore.
Describe a simple experiment to prove that a copper wire conducts electricity, but a piece of coal does not.
