What is iron ore consists of?
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When we heat one end of and iron bar, the other end also gets heated up why ?
Difference between an Atom and an Ion ?
Explain the Modes of valency ?
What causes smoke to curl up into the air ?
Explain the difference between the Metals and Metallurgy ?
what is the indicator used?
What are constituents of brass?
State lambert’s law.
Why does a dog hang out his tongue, when it is hot ?
From what raw material is paper manufactured ?
What is Distillation ?
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?