Solve this:

Q. In the protonation of NH3 molecule, following statement is true:-

    (1) A covalent bond is formed                                          (2) Hydrogen bond is formed

    (3) Hybridisation state of N is changed                            (4) Shape of NH3 molecule is changed

Dear Student,

When NH3 molecule is protonated, NH4+ is formed. The H is attached to NH3 by coordinate bond. The hybridisation of NH3 as well as NH4+ is same i.e. sp3.The shape is however changed from pyramidal to tetrahedral. Hence, correct answer is (4)

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