In the estimation of sulphur by Carius method, sulphur is oxidised to ............ which is precipitated as ............ by addition of ......

Explanation

To solve the question regarding the estimation of sulphur by the Carius method, we will fill in the blanks step by step.

### Step-by-Step Solution:

1. **Understanding the Carius Method**: The Carius method is a technique used to determine the amount of sulphur in organic compounds. It involves the oxidation of sulphur present in the sample.

2. **Oxidation of Sulphur**: In the Carius method, sulphur (S) is oxidized to sulphuric acid (H₂SO₄). This is the first blank we need to fill.

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