Mole Concept Worksheet – Class 11 (ISC/JEE Level)
Q1. Calculate the molarity of a solution containing 9.8 g of H ₂SO ₄ in 250 mL of solution.
Q2. How many grams of NaOH are required to prepare 500 mL of 0.2 M NaOH solution?
Q3. Find the molality of a solution prepared by dissolving 18.2 g of glucose (C ₆H ₁₂O ₆) in 200
g of water.
Q4. Calculate the volume of 0.5 M HCl required to neutralize 25 mL of 0.1 N Na ₂CO ₃ solution.
Q5. Find the molarity of a solution obtained by dissolving 4.9 g of H₂SO ₄ in 100 mL of
solution (density = 1.1 g/mL).
Q6. 100 mL of 1 M HCl is mixed with 100 mL of 2 M HCl solution. Calculate the final
molarity.
Q7. How many grams of H₂SO₄ are present in 200 mL of 0.5 N solution?
Q8. 2 g of NaOH pellets contain 80% pure NaOH. What volume of 0.1 N HCl will be required
to neutralize it?
Q9. Calculate the equivalent mass of H₂SO₄ in the reaction with NaOH.
Q10. Calculate the equivalent mass of KMnO₄ in acidic medium.
Q11. 25 mL of NaOH solution requires 30 mL of 0.1 N H ₂SO₄ for neutralization. Find the
normality of the NaOH solution.
Q12. What volume of O₂ gas at STP is required for complete combustion of 11.2 L of CO gas
at STP?
Q13. Calculate the number of moles of O₂ required to completely burn 5.6 g of C ₂H ₆.
Q14. A hydrocarbon on complete combustion gives 8.8 g of CO₂ and 5.4 g of H₂O. Find the
empirical formula.
Q15. A natural sample of boron consists of 20% B-10 and 80% B-11. Calculate the average
atomic mass.
Q16. 11.2 L of a gaseous hydrocarbon weighs 18 g at STP. Find its molecular formula if its
empirical formula is CH₂.
Q17. Calculate the number of molecules in 1 g of NH ₃.
Q18. A sample of Na₂CO₃ contains 15% moisture. What mass of this sample is required to
neutralize 50 mL of 0.1 N HCl solution?
Q1. Calculate the molarity of a solution containing 9.8 g of H ₂SO ₄ in 250 mL of solution.
Q2. How many grams of NaOH are required to prepare 500 mL of 0.2 M NaOH solution?
Q3. Find the molality of a solution prepared by dissolving 18.2 g of glucose (C ₆H ₁₂O ₆) in 200
g of water.
Q4. Calculate the volume of 0.5 M HCl required to neutralize 25 mL of 0.1 N Na ₂CO ₃ solution.
Q5. Find the molarity of a solution obtained by dissolving 4.9 g of H₂SO ₄ in 100 mL of
solution (density = 1.1 g/mL).
Q6. 100 mL of 1 M HCl is mixed with 100 mL of 2 M HCl solution. Calculate the final
molarity.
Q7. How many grams of H₂SO₄ are present in 200 mL of 0.5 N solution?
Q8. 2 g of NaOH pellets contain 80% pure NaOH. What volume of 0.1 N HCl will be required
to neutralize it?
Q9. Calculate the equivalent mass of H₂SO₄ in the reaction with NaOH.
Q10. Calculate the equivalent mass of KMnO₄ in acidic medium.
Q11. 25 mL of NaOH solution requires 30 mL of 0.1 N H ₂SO₄ for neutralization. Find the
normality of the NaOH solution.
Q12. What volume of O₂ gas at STP is required for complete combustion of 11.2 L of CO gas
at STP?
Q13. Calculate the number of moles of O₂ required to completely burn 5.6 g of C ₂H ₆.
Q14. A hydrocarbon on complete combustion gives 8.8 g of CO₂ and 5.4 g of H₂O. Find the
empirical formula.
Q15. A natural sample of boron consists of 20% B-10 and 80% B-11. Calculate the average
atomic mass.
Q16. 11.2 L of a gaseous hydrocarbon weighs 18 g at STP. Find its molecular formula if its
empirical formula is CH₂.
Q17. Calculate the number of molecules in 1 g of NH ₃.
Q18. A sample of Na₂CO₃ contains 15% moisture. What mass of this sample is required to
neutralize 50 mL of 0.1 N HCl solution?
