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21 August, 05:34

How does a trigonal pyramid differ from a tetrahedron so far as molecular geometry is concerned? Bond angles in the tetrahedral molecule are 120°, while those for trigonal pyramid are 109.5° A trigonal pyramid is a tetrahedron with two vacant vertex. A trigonal pyramid is a tetrahedron with one vacant vertex. Bond angles in the tetrahedral molecule are 109.5°, while those for trigonal pyramid are 120° A tetrahedron has a square base, while the base of a trigonal pyramid is a triangle.

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  1. 21 August, 05:56
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    A trigonal pyramid is a tetrahedron with one vacant vertex.

    Explanation:

    How does a trigonal pyramid differ from a tetrahedron so far as molecular geometry is concerned?

    Bond angles in the tetrahedral molecule are 120°, while those for trigonal pyramid are 109.5°. FALSE. Bond angles in the tetrahedral are 109.5°, while those for the trigonal pyramid are slightly lower than 109.5° due to the repulsion of the unshared pair of electrons on the central atom.

    A trigonal pyramid is a tetrahedron with two vacant vertex. FALSE.

    A trigonal pyramid is a tetrahedron with one vacant vertex. TRUE. This is the geometry of NH₃, in which the central atom is bonded to 3 atoms and has 1 unshared pair of electrons.

    Bond angles in the tetrahedral molecule are 109.5°, while those for trigonal pyramid are 120°. FALSE.

    A tetrahedron has a square base, while the base of a trigonal pyramid is a triangle. FALSE. Both have a triangular base.
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