JEE Mains Model Paper 4

Writing the O.N . of Cr,Cl and Mn on each species in the four set of ions, we have,
(1)

3+

CrO2−

,

+5

ClO3−

,

+6

CrO42−

,

+7

MnO4−

(2)

+5

ClO3−

,

+6

CrO42−

,

+7

MnO4−

,

+3

CrO2−

(3) )

3+

CrO2−

,

+5

ClO3−

,

+7

MnO4−

,

+6

CrO42−

(4)

+6

CrO42−

,

+7

MnO4−

,

+3

CrO2−

,

+5

ClO3−

Only in arrangement (1) ,the O.N .of central atom increases from left to right. Therefore, option (1) is correct