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NEET levelSingle correct optionDifficulty 1 of 3rg124

Assertion (A): The van der Waals constant for is greater than that for . Reason (R): molecules are held by hydrogen bonds in addition to dispersion forces. Choose the correct option.

  1. ABoth A and R are true and R is the correct explanation of A
  2. BBoth A and R are true but R is not the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is true

Answer: A

for is and for is . The larger attraction in ammonia arises from hydrogen bonding and dipole-dipole forces that nitrogen lacks, so R explains A.
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