Question

10 moles of A were present in a system initially, and 10 moles are added to it, it follows the reaction 4A -> B, what are the number of moles of B produced?

(a) 5

(b) 10

(c) 15

(d) 20

The question was posed to me in an international level competition.

The doubt is from Material Balance Concept topic in portion Introduction to Material Balances of Basic Chemical Engineering

Answer 1

Right option is (a) 5

For explanation: Moles of B = (10 + 10)/4 = 5.