Q32 / 150 · MHT CET 2024 (15 May Shift 1) · Chemistry

What is value of percent atom economy when reactants having sum of formula weight 78 u results in the formation of a product with formula weight 65 u ?

  • A
    $70 \%$
  • B
    $78 \%$
  • Correct answer
    C
    $83 \%$
  • D
    $65 \%$

Solution

$\begin{aligned} & \% \text { atom economy } \\ & =\frac{\text { Formula weight of the desired product }}{\text { Sum of formula weight of all the }} \times 100 \\ & \text { reactants used in the reaction } \\ & =\frac{65 \mathrm{u}}{78 \mathrm{u}} \times 100=83 \%\end{aligned}$

Hence, the correct answer is option: 'C'.

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