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The decreasing values of bond angles from NH3 (106º) to SbH3 (101º) down group-15 of the periodic table is due to [2006]
  • a)
    decreasing lp-bp repulsion
  • b)
    decreasing electronegativity
  • c)
    increasing bp-bp repulsion
  • d)
    increasing p-orbital character in sp3
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The decreasing values of bond angles from NH3 (106º) to SbH3 (101...
The bond angle decreases on moving down the group due to decrease in bond pair-bond pair repulsion.

NOTE : This can also be explained by the fact that as the size of central atom increases sp3 hybrid orbital becomes more distinct with increasing size of central atom i.e. pure p- orbitals are utilized in M–H bonding
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Most Upvoted Answer
The decreasing values of bond angles from NH3 (106º) to SbH3 (101...
Explanation:

Electronegativity:
- The decreasing values of bond angles from NH3 to SbH3 down Group-15 of the periodic table can be attributed to the decreasing electronegativity of the central atom.
- Electronegativity is the ability of an atom to attract shared electrons towards itself in a covalent bond.
- As we move down the group from nitrogen to antimony, the electronegativity of the central atom decreases.
- This results in a weaker pull on the bonding electron pairs, leading to a larger bond angle.

Effect on Bond Angles:
- In NH3 (ammonia), nitrogen is more electronegative compared to antimony in SbH3 (antimony hydride).
- The greater electronegativity of nitrogen results in stronger electron pair-bond pair repulsions, leading to a smaller bond angle in NH3.
- As we move down the group, the decreasing electronegativity of the central atom reduces the repulsion between the lone pair and bond pairs, allowing for a larger bond angle in SbH3.

Conclusion:
- Therefore, the decreasing values of bond angles from NH3 to SbH3 down Group-15 of the periodic table are primarily due to the decreasing electronegativity of the central atom.
- This change in electronegativity affects the repulsion between electron pairs, leading to variations in bond angles across the group.
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The decreasing values of bond angles from NH3 (106º) to SbH3 (101º) down group-15 of the periodic table is due to [2006]a)decreasing lp-bp repulsionb)decreasing electronegativityc)increasing bp-bp repulsiond)increasing p-orbital character in sp3Correct answer is option 'B'. Can you explain this answer?
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The decreasing values of bond angles from NH3 (106º) to SbH3 (101º) down group-15 of the periodic table is due to [2006]a)decreasing lp-bp repulsionb)decreasing electronegativityc)increasing bp-bp repulsiond)increasing p-orbital character in sp3Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The decreasing values of bond angles from NH3 (106º) to SbH3 (101º) down group-15 of the periodic table is due to [2006]a)decreasing lp-bp repulsionb)decreasing electronegativityc)increasing bp-bp repulsiond)increasing p-orbital character in sp3Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The decreasing values of bond angles from NH3 (106º) to SbH3 (101º) down group-15 of the periodic table is due to [2006]a)decreasing lp-bp repulsionb)decreasing electronegativityc)increasing bp-bp repulsiond)increasing p-orbital character in sp3Correct answer is option 'B'. Can you explain this answer?.
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