How to avoid the formation of dinitro product during synthesis of methyl m-nitrobenzene? i. Add the reagen

[answerhappygod]

How to avoid the formation of dinitro product during synthesisof methyl m-nitrobenzene?
i. Addthe reagents slowly
ii. Shakethe mixture vigorously
iii. Coolthe mixture in the ice-water bath
iv. Heat up themixture
A.iii & iv
B.ii & iv
C.i & iv
D i & iii
E. ii & iii
Acetanilide is more likely to be pure if ___________
I. its recorded melting point is close or similar tothat of the reference.
II. its recorded melting point is of a single value or ina small range.
III. its white crystals look completely dry and clean.
A.I
B.None of the above
C.II
D.III
E.I,II & III