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Q161) Potassium manganate (K2MnO4) is formed when ...[DEC 1994]




SOLUTION

K2MnO4 is formed when MnO2 is fused with KOH in air
2MnO2 + 4KOH + O2 → 2K2MnO4 + 2H2O
Answer: (b)


Q162) The shape of [Cu(H2O)6]2+ is [ Rohtak PMT 1994]




SOLUTION

Cu2+ = 3d9, after splitting of d-orbitals in an octahedral field, the two degenerate dx2 - y2 and dz2 orbitals contain unequal distribution of electrons , which causes distortion in the metal ligand, bond length are un equal
Answer: (d)


Q163) Mohr's salt is..[KCET 1994]



SOLUTION


Answer:(c)



Q164) When CuSO4 is electrolysed using platinum electrodes.. [ CBSE PMT 1993]



SOLUTION


Answer: (b)


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