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Subjects
Science State Board
Class 8
Air
Properties and uses of gases and global warming
7.
Chemical properties of carbon dioxide: choose the right answer
Exercise condition:
4
m.
1
.
The chemical formula for calcium carbonate is
\(CaCO_2\)
\(Ca_3CO\)
\(CaCO_3\)
.
2
.
Carbon dioxide
Oxygen
Carbon monoxide
does not support for combustion.
3
. When
excess amount
of \(CO_2\) passes through
calcium hydroxide
deionised water
drinking water
, it forms
sodium carbonate
calcium hydrogen carbonate
sodium bicarbonate
.
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