Given below are two statements:
Statement I: Pure Aniline and other Arylamines are usually colourless.
Statement II: Arylamines get coloured on storage due to atmospheric reduction.
In the light of the above statements, choose the most appropriate answer from the options given below:
Both Statement I and Statement II are incorrect
Both Statement I and Statement II are correct
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct
Correct answer:D
Standard Method
Given: Two statements about aniline and arylamines are to be checked.
Find: Which option correctly identifies the truth of Statement I and Statement II.
Statement I: Pure aniline and other arylamines are indeed colourless liquids.
Statement II: Aniline becomes coloured on storage, not due to reduction, but due to oxidation by air and light, forming brown-coloured quinonoid compounds. Hence, Statement II is incorrect.
Therefore, Statement I is correct but Statement II is incorrect.
The solution marks the correct option as D, but the statement analysis matches option C in the listed options. Hence, the defensible correct answer from the given options is C.
Concept Check
Given: The question tests the reason why aniline becomes coloured on storage.
Find: The correct truth values of the two statements.
Use the standard fact: aniline darkens on storage because of oxidation, not reduction. So Statement II is false immediately, while Statement I is true.
Thus the correct choice is Statement I is correct but Statement II is incorrect, which corresponds to option C in the provided list.
Assuming that colour formation on storage is due to reduction. This is wrong because aniline gets oxidized by air and light to coloured quinonoid species. Check whether the process is oxidation or reduction before choosing the statement.
Trusting the displayed option letter without matching it to the actual option text. This is wrong here because the solution explanation supports Statement I true and Statement II false, which corresponds to option C, not the displayed letter D. Always verify the option content.
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