These statements are about a gas.
1. It is produced by thermal decomposition of a carbonate.
...
These statements are about a gas.
1. It is produced by thermal decomposition of a carbonate.
2. It is produced by the fermentation of glucose.
3. It makes up 1% of unpolluted air.
4. It is produced during the production of steel from iron.
Which statements are correct for carbon dioxide?
a. 1 and 2 only
b. 1, 2 and 3
c. 1, 2 and 4
d. 1, 3 and 4
e. Other
Answers: 2
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