The mass of benzanilide obtained from the benzoylation reaction of 5.8 g of aniline, if yield of product is 82%, is _____ g (nearest integer). (Given molar mass in gmol−1 H : 1, C : 12, N : 14, O : 16)

The mass of benzanilide obtained from the benzoylation reaction of aniline is

Q. The mass of benzanilide obtained from the benzoylation reaction of 5.8 g of aniline, if yield of product is 82%, is _____ g (nearest integer).

(Given molar mass in gmol⁻¹ H : 1, C : 12, N : 14, O : 16)

Correct Answer: 10

Explanation

In benzoylation reaction, one mole of aniline produces one mole of benzanilide. Hence, the molar ratio of aniline to benzanilide is 1 : 1.

Molar mass of aniline (C₆H₅NH₂):

6 × 12 + 7 × 1 + 14 = 93 g mol⁻¹

Number of moles of aniline taken:

5.8 ÷ 93 = 0.0624 mol

Molar mass of benzanilide (C₆H₅NHCOC₆H₅):

13 × 12 + 11 × 1 + 14 + 16 = 197 g mol⁻¹

Theoretical mass of benzanilide formed:

0.0624 × 197 = 12.29 g

Given percentage yield is 82%, so actual mass obtained:

(82 ÷ 100) × 12.29 = 10.07 g

Nearest integer value of the mass of benzanilide obtained is 10 g.

Related JEE Main Questions

Consider the following electrochemical cell : Pt | O2 ( g ) (1 bar) | HCl (aq) || M2+ (aq, 1.0 M) | M ( s ) The pH above which, oxygen gas would start to evolve at anode is _____ (nearest integer).

Given below are two statements : Statement I : Elements 'X' and 'Y' are the most and least electronegative elements, respectively among N, As, Sb and P. The nature of the oxides X2O3 and Y2O3 is acidic and amphoteric, respectively. Statement II : BCl3 is covalent in nature and gets hydrolysed in water. It produces [B(OH)4]− and [B(H2O)6]3+ in aqueous medium. In the light of the above statements, choose the correct answer from the options given below :

A + 2B → AB2 36.0 g of 'A' (Molar mass : 60 g mol−1) and 56.0 g of 'B' (Molar mass : 80 g mol−1) are allowed to react. Which of the following statements are correct ?

At T(K), 100 g of 98% H2SO4 (w/w) aqueous solution is mixed with 100 g of 49% H2SO4 (w/w) aqueous solution. What is the mole fraction of H2SO4 in the resultant solution?

Given below are two statements : Statement I : The first ionization enthalpy of Cr is lower than that of Mn. Statement II : The second and third ionization enthalpies of Cr are higher than those of Mn. In the light of the above statements, choose the correct answer from the options given below :

Home / JEE Main Chemistry Study Material