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Chemistry CBSE Live product
Class 7 (2025-26)
The World of Metals and Non-metals
Revision I - The World of Metals and Non-metals
9.
Properties of non-metals
Question:
3
m.
Answer the following questions:
1.
Explain the different physical properties of non-metals.
i.
Why are non-metals not used in the manufacturing of electrical wire?
Non-metals break easily when stretched, and they are non-ductile
Non-metals do not break easily when stretched, and they are non-ductile
Non-metals are very hard to stretch, and they are non-ductile
Non-metals break easily when stretched, and they are ductile
Example:
Iron
Magnesium
Zinc
Oxygen
ii.
What happens when solid non-metals are struck with a hammer?
On hammering remains the same as they are rigid
They are hard, on hammering flattens into thin sheet
On hammering they easily break into a powdery mass
On hammering flattens into thin sheet
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