The correct option(s) to distinguish nitrate salts of Mn^ 2+ and Cu^ 2+ taken separately is (are)

JEE Advanced 2018 Chemistry question

The correct option(s) to distinguish nitrate salts of and taken separately is (are)

(A) shows the characteristic green colour in the flame test
(B)Only shows the formation of precipitate by passing in acidic mediumCorrect
(C)Only shows the formation of precipitate by passing in faintly basic medium
(D) has higher reduction potential than (measured under similar conditions)Correct

Answer: (B),(D)

Solution

(A) Copper, not manganese, gives the green (bluish-green) flame: false. (B) CuS has a very low and precipitates even in acidic medium (group II), while MnS does not: true. (C) In

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Question ID VK-026773