Question

25. A. What happens when Steam is passed over red hot iron also Write its chemical equations 5
B. Give reason why:
a). A piece of calcium metal when dropped in water, the gas evolved do not catch fire.
b). Metals when react with nitric acid do not produce H2 gas.
C. What changes take place when an ore of mercury is heated in air for a long time?
Write the name of the ore of mercury and the reaction involved in this proce

Answer 1

Answer:

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