JEE Main levelSingle correct optionDifficulty 2 of 3df091
Assertion (A): In the titration of FeX2+ with KMnOX4, dilute nitric acid is not used to acidify the solution.
Reason (R): Nitric acid is a reducing agent and would reduce MnOX4X− before it reacts with FeX2+.
ABoth Assertion and Reason are true and the Reason is the correct explanation of the Assertion
BBoth Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
CAssertion is true but Reason is false
DAssertion is false but Reason is true
Answer: C
A is true: HNOX3 is unsuitable. R is false, because nitric acid is an oxidising agent, not a reducing agent; it would oxidise FeX2+ itself and so the titre would be wrong. Hence A is true and R is false.