Question

In Sulphur estimation, 0.7 g of an organic compound gives 1 g of BaSO₄ by Carius method. What is the % of ‘S’ in the compound?

• A. 19.61
• B. 23.85
• C. 27.93
• D. 14.57

Hint:

When calculating the percentage of sulfur in a compound using the Carius method, always account for the molar masses of BaSO₄ and sulfur in the compound.

Answer 1

The Correct Option is A

Step 1: Understanding the Carius method.
In the Carius method, the organic compound reacts with an oxidizing agent to form BaSO₄, which is used to estimate the amount of sulfur present in the compound.
Step 2: Calculation of sulfur percentage.
From the problem:
\[ \text{Percentage of Sulfur} = \frac{1 \times 32}{233 \times 0.7} \times 100 = 19.61% \] Step 3: Conclusion.
The correct answer is (1) 19.61% as calculated above.