When the powder of a common metal is heated in an open China dish, its colour turns black. However, when hydrogen is passed over the hot black substance so formed, it regains its original colour. Based on the given information, answer the following


#1

When the powder of a common metal is heated in an open China dish, its colour turns black. However, when hydrogen is passed over the hot black substance so formed, it regains its original colour. Based on the given information, answer the following questions:
(i) What type of chemical reaction takes place in each of the two given steps? Write balanced chemical equations for both reactions.
(ii) Name the metal initially taken in the powdered form.


#2

(i) Step I Combination reaction/oxidation reaction

Step II Reduction reaction

(ii) Copper metal is taken initially in the powdered form.