Q.

Decreasing order of bond angle of (I) NF3, (II) PH3 (III)  AsF 3 is I. NCl3>NF3II.  Bond angle of NCl3NF3. IV. Bond angle of NH3

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a

I. II

b

I, III

c

I, II, III

d

I, II, IV

answer is B.

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Detailed Solution

Bond angle for ABx molecule ∝1EN of atom B EN of ClNF3. Hence I is correct. EN of H < F. So, bond angle of NH3 > NF3. Hence III is also correct.Thus, decreasing order of bond angle is:NH3 > NCl3 > NF3. Since EN of H < Cl.
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