Question
Geography Question on Resources and Development
Singareni Collieries still uses canaries to detect the presence of _________ gas.
Fill in the blank with the correct option.
A
methane
B
ozone
C
sulphur oxide
D
carbon monoxide
Answer
carbon monoxide
Explanation
Solution
Canaries are used to detect carbon monoxide in mines because this gas is colorless, odorless, and highly toxic, and canaries are more sensitive to its presence.