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Chemistry CBSE Live product
Class 7 (2026-27)
The World of Metals and Non-metals
Term I Revision I - The world of metals and non-metals
5.
Sonority - observation and inference
Question:
1
m.
Read
each observation carefully and
choose
the most
correct
inference.
Observation:
A teacher strikes three different objects.
- Steel ruler – ringing sound
- Copper plate – ringing sound
- Coal – dull sound
Inference
Steel and copper are sonorous materials
Coal is more sonorous than steel
All three objects possess sonority
Coal is the best material for making bells
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