General Science Chemistry MCQs

Q.  Which among the following gas usually causes explosions in coal mines?

a. Carbon monoxide
b. Hydrogen Sulphide
c. Nitrous oxide
d. Methane


ANSWER: See Answer
 
Mining accidents can have a variety of causes, including leaks of poisonous gases such as hydrogen sulfide or explosive natural gases, especially firedamp or methane, dust explosions, collapsing of mine stopes, mining-induced seismicity, flooding, or general mechanical errors.
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