Question:
Which of the following property is true for the given sequence NH3 > PH3 > AsH3 > SbH3 > BiH3 ?
Which of the following property is true for the given sequence NH3 > PH3 > AsH3 > SbH3 > BiH3 ?
Updated On: Apr 1, 2025
- Reducing property
- Thermal stability
- Bond angle
- Acidic character
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The Correct Option is B, C
Solution and Explanation
Thermal Stability: As we move down the group from NH3 to BiH3, the thermal stability decreases due to the increasing size of the central atom, which weakens the bonds. The sequence of thermal stability is:
NH3 > PH3 > AsH3 > SbH3 > BiH3
Bond Angle: The bond angle also decreases as we move down the group from NH3 to BiH3 due to the increase in the atomic size, which leads to less effective overlap of orbitals. Thus, the trend in bond angles is:
NH3 > PH3 > AsH3 > SbH3 > BiH3
The correct answer is both (B) : Thermal stability and (C) : Bond angle
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