Question

D. Fill up the blanks with the correct choice given in brackets.
Carbonates of zinc, magnesium, and copper on ....
.... (roasting/calcination) give the
respective metal oxides,
2. The oxide of zinc is ..........
............(basic/amphoteric).
3.
..... (Enzymes/Promoters) act as catalysts for the biochemical reactions taking
place in our body.
4. When paper, wood, or coal is burnt, it undergoes a ....... (physical/chemical)
change and releases a large amount of heat.
5. An upward arrow in a chemical equation depicts
(precipitate/evolution of gas)​

Answer 1

Answer:

1. CALCINATION

2. BASIC

3. ENZYMES

4. PHYSICAL

5. EVOLUTION OF GAS

Answer 2

Answer:

4 chemical 2 basic 5 evolution of gas