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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS
1
Medium
1 of 1
Analyzing
+4 | -1
The incorrect statement(s) among (1)-(3) is (are)
1) W(VI) is more stable than Cr(VI).
2) In the presence of HCl, permanganate titrations provide satisfactory results.
3) Some lanthanoid oxides can be used as phosphors.
1) W(VI) is more stable than Cr(VI).
2) In the presence of HCl, permanganate titrations provide satisfactory results.
3) Some lanthanoid oxides can be used as phosphors.
View answer and explanation
Correct option: B
2 only
The correct answer is B (2 only) because KMnO4 in the presence of HCl will oxidize HCl to Cl2, leading to inaccurate results in permanganate titrations.
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