Four groups of students were assigned separately the experiment of int

1.	Four groups of students were assigned separately the experiment of interaction of iron nails with a solution of copper sulphate. Each group recorded the observations as given b elow in the table.Group ofstudentsInitialcolour ofsolutionFinalcolour ofsolutionChanges inthe ironnailABlueColourlessGrey coatBGreenGreenBrown coatCBlueBlueBrown coatDBlueLightgreenBrown coatWhich group of students recorded all the observations correctly?(A) A (B) B (C) C (D) D
Answer» The correct answer is (D) D

Four groups of students were assigned separately the experiment of interaction of iron nails with a solution of copper sulphate. Each group recorded the observations as given b elow in the table.Group ofstudentsInitialcolour ofsolutionFinalcolour ofsolutionChanges inthe ironnailABlueColourlessGrey coatBGreenGreenBrown coatCBlueBlueBrown coatDBlueLightgreenBrown coatWhich group of students recorded all the observations correctly?(A) A (B) B (C) C (D) D

Answer»

The correct answer is

(D) D