1.

How can one understand the completion of the burning of lime?(a) Blue flame at the top disappears(b) Blue flame appears at the top(c) Smoke is released in huge quantity(d) Red flame appears at the top

Answer» The correct choice is (a) Blue flame at the top disappears

The best explanation: A blue flame indicates complete combustion, implying no wastage of resources.  Hence, we can ensure the proper burning of lime.


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