Question

1 has pure A and 2 has pure B and 3, 4 and 5 has mixture of A and B, how many independent equations are possible?

(a) 1

(b) 2

(c) 3

(d) 4

I had been asked this question during a job interview.

This intriguing question comes from Material Balances Problems Involving Multiple Units in section The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Answer 1

Correct choice is (d) 4

The explanation is: It will be just twice the number when there is only one component.