MolSynapsequestion bank
MolSynapse / Question bank / Mole Concept / Stoichiometry of single and sequential reactions
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3mc157

A mixture of 1.2 g of carbon and 1.6 g of sulphur is burnt completely in excess oxygen to give only and (, , ). Which statements are correct? Use 22.4 L/mol at STP.

  1. AThe mass of consumed is 4.8 g
  2. BThe mole fraction of in the product gas is 1/3
  3. CThe mass of the product gas mixture is 2.8 g
  4. DThe product gas mixture occupies 3.36 L at STP

Answer: A, B, D

Moles: C = 0.1, S = 0.05. Gas products = 0.15 mol = 3.36 L (true). used = 0.1 + 0.05 = 0.15 mol = 4.8 g (true). Product mass = 0.1 x 44 + 0.05 x 64 = 7.6 g, not 2.8 g (false). x() = 0.05/0.15 = 1/3 (true).
Practice Mole Concept More on Stoichiometry of single and sequential reactions

More questions on Stoichiometry of single and sequential reactions