The World of Metals and Non-metals
CBSE · Class 7 · Science
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What are metals and non-metals?
Answer
Metals and non-metals are sub-categories of elements. An element is a substance that cannot be broken down into simpler substances.
धातु और अधातु क्या हैं?
Answer
धातु एवं अधातु तत्व की उपश्रेणियाँ हैं। तत्व वह पदार्थ है जिसे सरल पदार्थो में नहीं तोड़ा जा सकता है।…
Why do copper, aluminium, and iron look shiny?
Answer
They show metallic lustre. Lustre shown by metals is known as metallic lustre.
तांबा, एल्युमीनियम और लोहा चमकदार क्यों दिखते हैं?
Answer
वे धात्विक चमक दिखाते हैं। धातुओं द्वारा दिखाई गई चमक को धात्विक चमक के रूप में जाना जाता है।…
Why can a metal sheet be made by hammering iron or aluminium?
Answer
Because metals are malleable. Malleability is the property by which materials can be beaten into thin sheets.
लोहे या एल्युमीनियम को हथौड़े से पीटकर धातु की चादर क्यों बनाई जा सकती है?
Answer
क्योंकि धातुएँ आघातवर्धनीय होती हैं। आघातवर्धनीयता वह गुण है जिसके द्वारा पदार्थों को पीटकर पतली चादरें बनाई जा सकती हैं।…
What happens when copper, iron, or aluminium is beaten with a hammer?
Answer
They flatten into sheets. This shows malleability, which is mainly seen in metals.
जब ताँबा, लोहा या एल्युमिनियम को हथौड़े से पीटा जाता है तो क्या होता है?
Answer
वे चादरों में चपटे हो जाते हैं। यह आघातनीयता को दर्शाता है, जो मुख्य रूप से धातुओं में देखा जाता है।…
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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