Astha has been collecting silver coins and copper coins. One day she observed a black coating on silver coins and a green coating on copper coin. A student burnt a metal A found in the form of ribbon. The ribbon burnt with a dazzling flame and a white powder B is formed which is basic in nature.
••identify A and B
if uh know the ans then ans is other wise no need of it unnec.essary don't ans irrelevant.*
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The Sun appears about two minutes before the actual sunrise and this phenomenon is known as advance sunrise. The Sun remains visible about two minutes after the actual sunset and this phenomenon is known as delayed sunset. The advance sunrise and delayed sunset happen due to atmospheric refraction.
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Explanation:
A student burnt a metal A found in the form of ribbon. The ribbon burnt with a dazzling flame and a white powder B is formed which is basic in nature.
ANSWER - metal A - magnesium
B - magnesium oxide
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