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Q129) Among the following which is used as an electrolyte in electroplating a baser metal with gold? [ CPMT 1992]




SOLUTION

K[Au(CN)2] is a water soluble complex salt of gold
Answer: (b)


Q130) Which is not amphoteric? [ CPMT 1991]




SOLUTION


Answer: (c)


Q131) Rusting of iron is catalyzed by ..[ MLNR 1990]



SOLUTION

rusting is catalyzed by acid (H+
Answer:(d)



Q132) Which of the following transition metal ions will have definite value of magnetic moment? [ Pn.CET 1990]



SOLUTION

Ti3+ = d1, has definite value of magnetic moment
Answer: (b)


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