Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below:
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
Answer
(3) Both Statement I and Statement II are correct
Solution
Statement-I: As per NCERT, benzenediazonium chloride is prepared by the reaction of aniline with nitrous acid (NaNO2 + HCl) at 273–278 K:
C6H5NH2 + NaNO2 + 2HCl 273-278 K C6H5N2+Cl- + NaCl + 2H2O
NCERT also states that it is stable in cold solution but decomposes easily in the dry state. Correct.
Statement-II: As per NCERT, iodine is not easy to introduce into the benzene ring directly, but iodobenzene is formed when the diazonium salt solution is treated with KI:
C6H5N2+Cl- + KI C6H5I + KCl + N2. Correct.
Answer: (3)