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Q.

Which one is the most ionic?

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a

P2O5

b

CrO3

c

MnO

d

Mn2O7

answer is C.

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Detailed Solution

The magnitude of the positive charge is directly proportional to polarization power.
- MnO has the highest magnitude of positive charge hence MnO is the most ionic compound.
- In the determination of ionic character, the electronegativity of the two atoms is involved. The greater the difference, the more the ionic character in the bond.

So, option C is correct. 

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