MCQ
Which of the following molecule has a planar structure ?
- A$O_2SF_2$
- B$OSF_2$
- ✓$XeF_4$
- D$ClO_4^-$

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$(b)\, NaOH$ in $20\, gm$ will be respectively.
Reason : Raoult’s law is a special case of Henry’s law.
