Consider the following reaction sequence conc.HNO3 + conc.H2SO4 333 K P 1. Sn/HCl/ 2. pH neutralised Q S (CH3CO)2 O R (major product) 1. HCl/EtOH, 2. pH neutralised conc.H2SO4 conc.HNO3 + T The percen

Question

Consider the following reaction sequence conc.HNO3 + conc.H2SO4 333 K P 1. Sn/HCl/ 2. pH neutralised Q S (CH3CO)2 O R (major product) 1. HCl/EtOH, 2. pH neutralised conc.H2SO4 conc.HNO3 + T The percentage of nitrogen in product ‘T’ formed is ________%. (Nearest integer) (Given molar mass in g mol –1 H:1, C:12, N:14, O:16)

Prashant Kotian · Accepted Answer

Correct answer: .. HNO3 HCl EtOH H2SO4 Ph–NO2 Sn/HCl Ph–NH2 (CH3CO)2O Ph–NH–C–CH3 O NH2 NO2 (P) (Q) (R) H2SO4 HNO3 O NH–C–CH3 NO2 (S) (T) Mol. wt = 6 × 12 + (6 × 1) + (2 × 14) + (2 × 16) = 138 %N 20.29%    75. Consider the following reactions: NaCl+K2Cr2O7+H2SO4A+KHSO4+NaHSO4+H2O A + NaOH  B + NaCl + H2O B + H2SO4 + H2O2  C + Na2SO4 + H2O In the product 'C', 'X' is the number of  2 O units, 'Y' is the total number oxygen atoms present and 'Z' is the oxidation state of Cr. The value of X + Y + Z is ______ . Ans. (13) Sol. A  CrO2Cl2 B  Na2CrO4 C  CrO5 O Cr O O +6 O O X = 2 , Y = 5 and Z = 6 ALLEN

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