ChemistryJEE Main 5 Apr 2026, Shift 1·Q22·Numerical·Easy–moderate

Purification & Characterisation · Carius method sulphur estimation

In an estimation of sulphur by Carius method 0.2g of the substance gave 0.6 g of $\ce{BaSO4}$ . The percentage of sulphur in the substance is %.

(Given molar mass in g mol $^{-1}$ S : 32, $\ce{BaSO4}$ : 233)

We corrected a printing error in the original paper

Source printed “BaSO $_4$ : 231” (the molar mass of BaSO $_4$ is 137 + 32 + 64 = 233); corrected to 233. Answer corrected; the source key is 42 (computed with 231) — with 233, $(32/233)\times(0.6/0.2)\times100 = 41.2$ , i.e. 41.

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Purification & Characterisation · Carius method sulphur estimation

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