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Per NCERT Table 4.8, the H-N-H bond angle in NH₃ is which value, and why is it less than the tetrahedral 109.5°?
A180°
B120° (trigonal planar)
C107° — lone pair on N repels the three N-H bond pairs more than bp-bp repulsion would
D109.5° exactly
Answer & Solution
Correct answer: C. 107° — lone pair on N repels the three N-H bond pairs more than bp-bp repulsion would
Per NCERT Table 4.8 + §4.6.1, NH₃ is sp³ with 1 lp + 3 bp. lp-bp > bp-bp repulsion → angle compressed to 107°.
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