Q.

Statement 1: The green manganate is paramagnetic but the purple permanganate is diamagnetic in nature.Statement 2: MnO42− contains one unpaired electron while in MnO4− all electrons are paired.

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a

Both statements 1 and 2 are correct

b

Statement 1 is correct statement 2 is incorrect

c

Statement 1 is incorrect statement 2 is correct

d

Both statements 1 and 2 are incorrect

answer is A.

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Detailed Solution

Statement 1: Correct statement and reason is correct explanation of assertion.Green→MnO42−−Ar183d14s0; there is one unpaired electron, so paramagnetic.Purple→MnO4−−Ar183d04s0; here all electrons are paired, so diamagnetic.
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Statement 1: The green manganate is paramagnetic but the purple permanganate is diamagnetic in nature.Statement 2: MnO42− contains one unpaired electron while in MnO4− all electrons are paired.