Consider the following sequence of reactions. CH3 NO2 (i) Sn, HCl/ (ii) pH neutralisation (A) (i) (H3CCO)2O (ii) Br2/AcOH (B) 4–Nitrotoluene Assuming that the reaction proceeds to completion, then 137

Question

Consider the following sequence of reactions. CH3 NO2 (i) Sn, HCl/ (ii) pH neutralisation (A) (i) (H3CCO)2O (ii) Br2/AcOH (B) 4–Nitrotoluene Assuming that the reaction proceeds to completion, then 137 mg of 4-nitrotoluene will produce ______mg of B. (Given molar mass in g mol–1 H : 1, C : 12, N :14, O :16, Br : 80)

(A) 301
(B) 146
(C) 228
(D) 208

Prashant Kotian · Accepted Answer

Correct answer: C. CH3 NO2 (137 mg) (i)Sn/HCl (ii)pHneutrallisation  CH3 NH2 (A) 2 (CH CO) O  CH3 NH CH3 O Br AcOH  CH3 NH CH3 O Br (B) (Mass of B is 228 gm) Mole = 137 10   = 0.001 mole Mole of product = 0.001 mole Mass of product = 0.001 × 228 gm = 0.228 gm = 228 mg

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