Multiple choice

Which of the following statements is / are correct?

  1. Dry ice is CO2.
  2. Nitrous oxide is used for anesthesia in dentistry.
  3. On heating NH4Cl, it turns to liquid.

  1. 1 only

  2. 2 only

  3. 3 only

  4. 1 and 2 only

  5. 2 and 3 only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  1. Solid carbon dioxide is commonly called as dry ice.
    1. Nitrous oxide (N2O) has been used for anesthesia in dentistry and other surgical operations. Solid carbon dioxide is commonly called as dry ice. 3. On heating NH4Cl, it goes to gaseous state due to the process of sublimation. A change of state directly from solid to gas without changing into liquid state is called sublimation.

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