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Periodic Properties (NEST)

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Arrange the following in increasing order of H-E-H bond angle:

  1. NH3
    2. PH3
    3. AsH3
    4. SbH3
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A
4 < 3 < 2 < 1
💡 Explanation:

All of these molecules have pyramidal geometry. On moving down the group, H-E-H bond angle decreases due to increase in atomic size. So, correct order of increasing H-E-H bond angles is SbH3 < AsH3 < PH3 < NH3.

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