Chemistry jamb 1993

Water can be identified by the use of?

a

anhydrous copper (II) tetraoxosulphate (VI)

b

anhydrous sodium trioxocarbonate (IV)

c

potassium heptaoxochromate (VII)

d

copper (II) trioxocaronate (IV)

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a

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CoCl2 -----> blue to pink

CuSO4------> white to blue

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