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The hybridisation of the central atom and shape of NH₃ are:
Asp³, trigonal pyramidal
Bsp³, tetrahedral
Csp, linear
Dsp², trigonal planar
Answer & Solution
Correct answer: A. sp³, trigonal pyramidal
Nitrogen in NH₃ uses **sp³** hybridisation. Three hybrids form N–H bonds; the fourth holds a lone pair. The lone pair compresses the H–N–H angle to ~107°, giving a **trigonal pyramidal** shape.
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