What is the composition of gun-powder ?
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When kerosene oil is burnt, lamp black is produced it is a
from of carbon.
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Though the secondary cell can be recharged again and again, still they have a lifetime. Why?
Explain the Physical change?
What is Liquation ?
Explain the Mixture?
What is meant by amalgam ?
explain sour gas?
Why do we hear thunder after seeing a flash of lightning ?
Explain the Chemical change?
Explain about Atomic Weight ?
What is fluidity of a liquid?
Why does a white paper appear white, when light is not to fall on it ?
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