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BITSAT2018ChemistryRedox ReactionsActual

Which of the following statements is incorrect regarding the equation MeCHO + Ag NH 3 2 + + O ¯ H ⟶ MeCOO - + Ag

Options

  1. AThe equivalent weight of MeCHO is 22 .
  2. BThree moles of O ¯ H are required in the reaction.
  3. CMeCHO acts as an oxidising agent.
  4. DAg NH 3 2 + gets reduced.

Correct answer

C. MeCHO acts as an oxidising agent.

Step-by-step solution

Oxidation : CH 3 COO - + 3 O ¯ H → CH 3 COO - + 2 e - + 2 H 2 O Reduction : Ag NH 3 2 + + e - ⟶ Ag + NH 3 × 2 CH 3 CHO + 2 Ag NH 3 2 + + 3 O ¯ H ⟶ CH 3 O O ¯ + 2 H 2 O Molecular mass M of CH 3 CHO = 44   g   mol - 1 Equivalent weight Eω = M n - factor = 44 2 = 22   g   mol - 1 Since aldehyde is getting oxidised therefore, it is acting as reducing agent and not oxidising agent.

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