What is the oxidation number of nitrogen in NH₃?
Let N = x. H = +1. Equation: x + 3(+1) = 0, x + 3 = 0, x = -3.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Classical and Electronic Concept of Redox and Oxidation Number
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The bond angle in NH₃ is approximately:
In NH₃ , nitrogen is sp³ hybridized with one lone pair, reducing the bond angle from 109.5° to 107° due to lone pair-bond pair repulsion.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Hydrogen Bonding and Resonance and Dipole Moment