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Q225) The equivalent weight of KMnO4 ( formula weight = M) when it is used as an oxidant in neutral medium is [ CPMT 1996]




SOLUTION

In neutral medium, the reaction of KMnO4 is
MnO4- + 2H2O + 3e- 7rarr MnO2 + 4OH-
Therefore, its equivalent weight is molecular weight, M/3
Answer: (c)


Q226) Which of the following compounds gives red precipitate with AgNO3? [ MP PMT 1995]




SOLUTION

2AgNO3 + K2CrO4 → Ag2CrO4 ( red precipitate) + 2KNO3
Answer: (b)


Q227) Gun metal is an alloy of [ EAMCET 1995]



SOLUTION


Answer:(c)



Q228) Actinides .. [ CBSE PMT 1994]



SOLUTION


Answer: (d)


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