Add `2mn, - 4mn , 8mn, - 6mn` answer please

Add: -7mn + 5, 12mn + 2, 9mn -8, -2mn - 3

Multiply the 6mn , 0 mn

Among the following how many metal ions have green colour in their hydrated state? \(V^{+3},Cr^{+3},Mn^{+2},Mn^{+6},Ni^{+2},Mn^{+3},CO^{+3}\)

Considering H_2O as a weak field ligand, the number of unpaired electrons in [Mn(H_2O)_6]^(2+) will be (At. no. of Mn=25 )

If the middle term amongst any odd number (n) consecutive terms of an A.P, is m, then their sum is (a) 2m^2n (b) (mn)/2 (c) mn (d) mn^2

Add:(i)3mn-5mn,8mn-4mn(ii)t-8tz,3tz-z,z-t