Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202525 Apr 2025Morning ShiftChemistryHaloalkanes and HaloarenesActual

Calculate percentage atom economy when 46 g ethanol is obtained from 64.5 g chloroethane and 56 ~g~ KOH ( aq )

Options

  1. A25 25 %
  2. B38 17 %
  3. C50 25 %
  4. D64 17 %

Correct answer

B. 38 17 %

Step-by-step solution

The reaction proceeds by nucleophilic substitution: C₂H₅Cl + KOH C₂H₅OH + KCl Percentage atom economy evaluates the mass efficiency of the desired product formation: Percentage Atom Economy = Mass of desired product Total mass of all reactants 100 % Given 64.5 g chloroethane and 56 g potassium hydroxide produce 46 g ethanol, the total reactant mass sums to 120.5 g . The atom economy becomes: 46 120.5 100 % 38.17 % This result could be confirmed by computing the total product mass: 46 g ethanol + 74.5 g KCl = 120.5

Practice Haloalkanes and Haloarenes on Quantrex Academy →

More from Haloalkanes and Haloarenes

With reference to the two statements Assertion and Reason, choose the correct option. Assertion: The order of reactivity towards S_N 1 reaction is: C₆ H₅- CH₂ Br > (CH₃ )₃- C - Br 2026What is the major product [Z] formed when compound [C] undergoes the following reactions: 2026Identify the compounds A and B from the following reaction sequence: 2026Identify the wrong statement from the following 2026Two statements, Assertion and Reason are given. With reference to them, choose the correct option. Assertion: Hydrolysis of 2-Bromo-2-methylpropane follows S_N1 mechanism which inv 2026Identify X, Y and Z. 2026Which one is an INCORRECT statement with regard to the following reaction? 2026The compound from which chlorobenzene cannot be prepared easily is 2026 Full Haloalkanes and Haloarenes list All MHT CET PYQs