In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of $\mathrm{BaSO}_{4}$. The percentage of sulphur in the substance is ____ %. (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{~S}: 32, \mathrm{BaSO}_{4}: 231$ )

JEE Main · 2026 · 05 Apr 2026 · Shift 1 · Practical and Analytical Chemistry

In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of

BaSO_{4}

. The percentage of sulphur in the substance is ____ %.
(Given molar mass in

g mol^{- 1} S : 32, BaSO_{4} : 231

)

Answer: 42

Solution

In the Carius method every sulphur atom of the compound is precipitated as

BaS O_{4}

, and one mole of

BaS O_{4}

carries one mole of sulphur. The mass of sulphur contained in the precipitate is

\frac{32}{231} \times 0.6 = 0.0831 g

. Taken as a fraction of the sample weighed out,

% S = \frac{32 \times 0.6}{231 \times 0.2} \times 100 = \frac{19.2}{46.2} \times 100 = 41.56%

. Rounded to the nearest integer, the percentage of sulphur in the substance is

42%

JEE Main · 2026 · 05 Apr 2026 · Shift 1 · Integer answer

Practise more: all JEE Main PYQs on Practical and Analytical Chemistry →

More JEE Main questions on Practical and Analytical Chemistry

Consider the following reactions.
$PbCl_{2} + K_{2} CrO_{4} \to A + 2 KCl$ (Hot solution)
$A + NaOH ⇌ B + Na_{2} CrO_{4}$ …
JEE Main 2026View solution →
In Carius method, 0.75 g of an organic compound gave 1.2 g of barium sulphate, find percentage of sulphur (molar mass $32 g mol^{- 1}$ ). Molar mass of barium sulphate is $233 g mol^{- 1}$ .
JEE Main 2026View solution →
Sodium fusion extract of an organic compound (Y) with $CHCl_{3}$ and chlorine water gives violet color to the $CHCl_{3}$ layer. 0.15 g of $(Y)$ gave 0.12 g of the silver halide precipitate in Carius method. Percentage of halogen in the compound …
JEE Main 2026View solution →
When 1 g of compound ( X ) is subjected to Kjeldahl's method for estimation of nitrogen, 15 $mL, 1 M H_{2} SO_{4}$ was neutralized by ammonia evolved. The percentage of nitrogen in compound $(X)$ is :
JEE Main 2026View solution →
Identify the correct statements:
A. Hydrated salts can be used as primary standard.
B. Primary standard should not undergo any reaction with air.
C. Reactions of primary standard with another substance should be instantaneous and stoichiometric.
D. Primary standard should not be …
JEE Main 2026View solution →
Match List-I with List-II.

List-I: Functional group (detection)
(A) Unsaturation (Baeyer's test)
(B) Alcoholic group (Ceric ammonium nitrate test)
(C) Aldehyde group (Tollen's reagent)
(D) Phenolic group ( $FeCl X_{3}$ test)

List-II: Change observed during detection
(I) Red co …
JEE Main 2026View solution →