Question

# Which of the following is/are the correct characteristics of anionic part of 'X'?[Polar and non-polar nature to be considered on the basis of dipole moment](I) Planar(II) non-planar(III) Polar(IV) non-polar

A
I and III
B
I and IV
C
II and III
D
II and IV

Solution

## The correct option is B I and IVWhen $$KI$$ and $$I_2$$ reacts, it forms $$I_3^-$$$$KI+I_2 \rightarrow K^++I^-_3$$So, the species $$X$$ formed is $$I_3^-$$.It undergoes $$sp^{3}d$$ hybridization with linear geometry.The anionic part of X that is $$I^-$$ is planar and non-polar.Because all the lone pair and the bonded atoms with the central atom lie on the same plane. The anionic part is non-polar because the electronegativity difference between the bonded adjacent atom is Zero. Consequently, dipole moment is zero.Hence, $$I$$ & $$IV$$ are correct.Chemistry

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