When t-butanol and n-butanol are separately treated with a few drops of dilute `KMnO_(4)` in one case only, the purple colour disappears and a brown precipitate is formed. Which of the two alchols gives the above reaction and what is the brown precipitate?

When t-butanol and n-butanol are separately treatement with a few drops of dilute KMnOD_(4) in one case only, the purple colour disappears and a brown precipitate is formed. Which of the two alchols gives the above reaction and what is the brown precipitate?

p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue. Treatment of aqueous solution of Y with reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, the treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z. Q. Compound X is