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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  1999
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Q)

Which of the following compound is coloured and has unpaired electron :


( A ) $CuF_2$
( B ) $K_4[Fe(CN)_6]$
( C ) $K_2Cr_2O_7$
( D ) $KMnO_4$

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