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NTA Abhyas JEE Main2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

The decreasing order of the bond moment of E-H bond in NH 3 , PH 3 , AsH 3 and SbH 3 is given by

Options

  1. ANH 3 > PH 3 > AsH 3 > SbH 3
  2. BSbH 3 > AsH 3 > PH 3 > NH 3
  3. CNH 3 > AsH 3 > PH 3 > SbH 3
  4. DNH 3 > SbH 3 > AsH 3 > PH 3

Correct answer

D. NH 3 > SbH 3 > AsH 3 > PH 3

Step-by-step solution

Electronegativities of N(3.0), P (2.1), As (2.0), Sb (1.9) and H (2.1) point out clearly that the correct order of decreasing polarity is : NH 3 > SbH 3 > AsH 3 > PH 3

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