Question

What is the percentage atom utilisation?

(a) (mole wt of desired product*100)/mole wt of (desired product+total product)

(b) (mole wt of desired product*100)/mole wt of (desired product)

(c) (mole wt of desired product*100)/mole wt of (desired product+used product)

(d) (mole wt of desired product*100)/mole wt of (desired product+by product)

The question was posed to me in an online quiz.

This interesting question is from Needs of Green Chemistry in chapter Green Chemistry of Applied Chemistry

Answer 1

Right choice is (d) (mole wt of desired product*100)/mole wt of (desired product+by product)

The explanation is: The percentage atom utilisation is given by (mole wt of desired product*100)/mole wt of (desired product+by product). Here, mole wt indicates the molecular weight. The by product can be used to re generate the reaction.