Question

2 .Identify in the following reaction: 2
2. PbO +C→2Pb +CO

a) The substance oxidised and
b) The substance reducecd
3. A shiny brown coloured element “x” on heating in air becomes black in colour. Name the element “x” and the black coloured compound formed. (2)
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Answer 1

Explanation:

1)PbO is Lead (II) Oxide that is reduced to Lead (Pb) and Carbon or C is oxidized to CO2 or

Carbon dioxide.

2)Copper is the brown coloured element X which on heating in air becomes black coloured compound copper oxide

Answer 2

Answer:

2. a. Carbon, b. Pb ( lead )

3.  X is copper and the black coloured compund is copper oxide