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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
The geometry of ammonia molecule can be best described as
  • A
    Nitrogen at one vertex of a regular tetrahedron, the other three vertices being  occupied by three hydrogens
  • B
    Nitrogen at the centre of the tetrahedron, three of the vertices being occupied by  three hydrogens
  • C
    Nitrogen at the centre of an equilateral triangle, three corners being occupied by  three hydrogens
  • D
    Nitrogen at the junction of a $T,$ three open ends being occupied by three  hydrogens
✓

Answer

$(b)$ In $\ddot{N}{{H}_{3}}$ central atom is nitrogen which is $sp^3$ hybridized  hence, it will be at the centre of tetrahedron with $H-$ atoms at three vertices.

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