Question

For the reaction $2P+Q⟶R$
8 mol of P and 5 mol of Q will produce:-

• A. 8 mol of R
• B. 5 mol of R
• C. 4 mol of R
• D. 13 mol of R

Answer 1

The correct option is C 4 mol of R

$2P+Q⟶R$
When 5 moles of Q is taken, it would require 10 moles of P to yield 5 moles of the product R. Here, only 8 moles of P are available, so P is the limiting reagent.

So 8 moles of P will react with 4 moles of Q to yield 4 moles of the product R. The remaining 1 mole of Q is left unreacted.