carbon dioxide

The percentage of carbon dioxide gas in air is

• 1

• 21

• 0.03

• 78

A gas which turns limewater in to turbid is ............... gas

• Oxygen

• Ozone

• Carbon dioxide

• Nitrogen

Carbon dioxide is a:

• compound

• element

• mixture

• molecule

how many atoms make up a molecule of carbon dioxide ( CO₂)?

• 1

• 2

• 3

• 4

Carbon dioxide is produced from

• Photosynthesis process

• exhalation process

• burning of a candle

Air is heavier than carbon dioxide gas

• True

• False

Carbon dioxide scarcely dissolves in water

• True

• False

Carbon dioxide is used in the industry of

• steel

• soft drinks

• gunpowder

• fertilizers

Carbon dioxide gas doesn't burn and doesn't help in burning

• True

• False

The gas that forms 0.03% of the volume of air

• Oxygen

• Carbon dioxide

• Nitrogen

• hydrogen