Which of the following is known as "laughing gas" ?
-
Carbon dioxide
-
Nitrous oxide
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Nitrogen Dioxide
-
Nitrous Trioxide
B
Correct answer
Explanation
Nitrous oxide (N2O) is commonly called 'laughing gas' because it causes euphoria and laughter when inhaled. It was discovered by Humphry Davy and has been used as an anesthetic and in dentistry for its pain-relieving and euphoric effects.