MCQ
In the reaction $BF_3 + NH_3 \to F_3B.NH_3$
- ABond angle $F -B -F$ increase
- B$H\hat NH$ bond angle decrease
- ✓regular geometry of $BF_3$ changed
- Dregular geometry of $NH_3$ changed

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$(A)$ $\Delta S _{ x \rightarrow z}=\Delta S _{ x \rightarrow y}+\Delta S _{ y \rightarrow z}$
$(B)$ $w_{x \rightarrow z}=w_{x \rightarrow y}+w_{y \rightarrow z}$
$(C)$ $w_{x \rightarrow z \rightarrow z}=w_{x \rightarrow y}$
$(D)$ $\Delta S _{x \rightarrow y \rightarrow z}=\Delta S _{x \rightarrow y}$