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JEE Main202122 Jul 2021Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which one of the following group- 15 hydride is the strongest reducing agent ?

Options

  1. AAsH 3
  2. BBiH 3
  3. CPH 3
  4. DSbH 3

Correct answer

B. BiH 3

Step-by-step solution

When we go down the group, the size of the atom increase also the distance between the metal hydrogen bond increases in hydrides. So, the strength of the metal hydrogen bond decreases. A reducing agent is one that supplies a hydrogen atom. Among 15 th   group hydrides, BiH 3 is strongest reducing agent.

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