Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main20264 April 2026Morning ShiftChemistrySome Basic Concepts of ChemistryActual

Number of moles and number of molecules in 1.4187 L of SO₂ at STP respectively are:

Options

  1. A0.1266; 3.812 10²²
  2. B0.0633; 3.812 10²²
  3. C0.1266; 7.6238 10²²
  4. D0.0633; 7.6238 10²²

Correct answer

B. 0.0633; 3.812 10²²

Step-by-step solution

Volume of SO₂ at STP = 1.4187 L Molar volume of an ideal gas at STP is approximately 22.414 L. Number of moles n = Volume Molar Volume = 1.4187 22.414 = 0.0633 Number of molecules = n N_A Number of molecules = 0.0633 6.022 10²³ = 3.812 10²² Answer: 0.0633; 3.812 10²²

Practice Some Basic Concepts of Chemistry on Quantrex Academy →

More from Some Basic Concepts of Chemistry

Match List-I with List-II. List-I Mass of substance List-II Number of atoms A. 1.8 mg water I. 2 10⁻⁴ N_A B. 9.8 mg sulphuric acid II. 1.5 10⁻⁴ N_A C. 1.8 mg carbon III. 3 10⁻⁴ N_A 2026Which of the following contain the same number of atoms ? (Given : Molar mass in g mol ⁻¹ of H, He, O and S are 1, 4, 16 and 32 respectively) A. 2 g of O₂ gas B. 4 g of SO₂ gas C. 2026An oxide of iron contains 69.9 % iron, its empirical formula, is: (Given: Molar mass of Fe and O are 56 and 16 g mol ⁻¹ respectively.) 2026What volume of hydrogen gas at STP would be liberated by action of 50 mL of H₂SO₄ of 50 % purity (density = 1.3 g mL ⁻¹ ) on 20 g of zinc ? Given : Molar mass of H, O, S, Zn are 1, 2026How many grams of residue is obtained by heating 2.76 g of silver carbonate? (Given: Molar mass of C, O and Ag are 12 , 16 and 108 g mol ⁻¹ respectively) 2026The correct order of total number of atoms present in (A) 2 moles of cyclohexane (B) 684 g of sucrose (C) 90.8 L of dihydrogen at STP is: 2026The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1 . It has two carbon atoms. The weight (in g) of CO₂(g) formed when 3.38 g of this hydrocarbon is completely b 2026For the given reaction: CaCO ₃+2 HCl CaCl ₂+ H ₂ O + CO ₂ If 90 ~g CaCO ₃ is added to 300 mL of HCl which contains 38.55 % HCl by mass and has density 1.13 ~g ~mL ⁻¹ , then which o 2026 Full Some Basic Concepts of Chemistry list All JEE Main PYQs