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On a cold winter night, the person sleeping in a room with closed door and windows with a coal fire burning inside may die due to the excessive accumulation of:- nitrogen monoxide
- nitrogen dioxide
- carbon dioxide
- carbon monoxide
Correct answer: D. carbon monoxide
Explanation: Due to the burning of coal, the available oxygen gets depleted and it leads to incomplete burning of coal. Incomplete combustion of coal gives carbon monoxide gas. It is a very poisonous gas. It is dangerous to burn coal in a closed room.
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