Question:
Which mine gas is colourless, odourless, and highly toxic, often called the “silent killer” in mining?
Which mine gas is colourless, odourless, and highly toxic, often called the “silent killer” in mining?
Show Hint
Carbon monoxide forms
\[
\boxed{\text{Carboxyhaemoglobin (COHb)}}
\]
which prevents oxygen transport in blood.
Updated On: Jul 14, 2026
- Methane
- Carbon monoxide
- Hydrogen sulphide
- Nitrogen dioxide
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The Correct Option is B
Solution and Explanation
Step 1: Recall the properties of common mine gases.
Carbon monoxide (CO) is a colourless, odourless, tasteless, and highly poisonous gas.
Step 2: State why it is dangerous. CO combines readily with haemoglobin, reducing the oxygen-carrying capacity of blood. Therefore, it is commonly known as the \[ \boxed{\text{``Silent Killer''}.} \] Hence, \[ \boxed{(B)} \] is the correct answer.
Step 2: State why it is dangerous. CO combines readily with haemoglobin, reducing the oxygen-carrying capacity of blood. Therefore, it is commonly known as the \[ \boxed{\text{``Silent Killer''}.} \] Hence, \[ \boxed{(B)} \] is the correct answer.
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