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7- The molecule of NH, is a) tetrahedral with bond angle 109.5° b) pyramidal with bond angle 107° d) linear with bond angle 1
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7. Answer is B) Pyramidal with bond angle of 107

The NH3 molecular geometry (molecular shape) is trigonal pyramidal. The NH3 bond angles are 107 degrees because the hydrogen atoms are repelled by the lone pair of electrons on the Nitrogen atom.

8. Answer is A) tetrahedral geometry

NH4+1 and SO4-2 both have sp3 hybridisation, and central atom doesnot have lone pair, so geometry is tetrahedral.

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