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Question

NH3 is more liquefiable when compared to HCl. Why?
  1. Lower molecular mass

  2. H - bonding

  3. Presence of Cl

  4. Presence of H


Solution

The correct option is B

H - bonding


When we try to liquefy a gas, it is necessary to reduce temperature and increase pressure.

When this is done to NH3, this process becomes easier as H-bonds also help in pulling together the molecules.

This will not happen in HCl because of the bigger size of Cl.

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