Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
99 Percentile Qs Bank for JEE MainChemistrySolutions

5 g sulphur is present in 100 g of C S 2 . Δ T b of solution 0.954 and K b is 4.88. The molecular formula of sulphur is

Options

  1. AS 2
  2. BS 4
  3. CS 3
  4. DS 8

Correct answer

D. S 8

Step-by-step solution

ΔT b = K b × m m = Δ T b K b or W 2 × 1000 M 2 × W 1 = Δ T b K b or 5 × 1000 M 2 × 100 = 0.954 4.88 M 2 = 256 Atomic weight of sulphur = 32 Number of sulphur atom = M o l e c u l a r weight A t o m i c weight = 256 32 = 8 Hence Molecular formula = S 8 .

Practice Solutions on Quantrex Academy →

More from Solutions

In a solvent S , a compound B is partially dissociated into C and D as given below: B 2 C + 2 D B , C and D are non-volatile in nature. The molar mass of B is 10 times the molar ma 2026Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution of B in A inside a closed container having a total vapour pressure of 100 mm Hg at 300 K. 2026Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution of B in A inside a closed container having a total vapour pressure of 100 mm Hg at 300 K. 2026Given below are two statements: Given: Molar mass of C, H, O, Cl are 12, 1, 16 and 35.5 g mol ⁻¹ , respectively. Statement I: In 30 % (w/w) solution of methanol in CCl ₄ (at T K), 2026Which of the following statements are not correct? A. For water, magnitude of K_b is more than the magnitude of K_f . B. The elevation in boiling point of water when a non-volatile 2026Given below are two statements : Statement I : H₂ O molecules move from the chamber 1 to chamber 2 . Statement II : The osmotic pressure of a solution prepared by dissolving 50 mg 2026When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was x % of vapor pressure of pure solvent. What is x % ? 202620 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution 2026 Full Solutions list All 99 Percentile Qs Bank for JEE Main PYQs