Question:
Which of the following compound used in petrol refining?
Which of the following compound used in petrol refining?
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Caustic washing with aqueous alkali removes the acidic impurities from petroleum fractions.
Updated On: Nov 12, 2026
- Calcium carbonate
- Sodium carbonate
- Hydrogen peroxide
- Sodium hydroxide
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Crude petroleum fractions contain acidic impurities such as hydrogen sulphide, thiols and naphthenic acids.
Step 2: How they are removed
Washing the fractions with aqueous sodium hydroxide (caustic washing) converts these acids into water-soluble sodium salts, which are then separated.
Step 3: Result
So sodium hydroxide is used in petroleum refining. It is also used in making soap, paper and rayon.
Final Answer:
Sodium hydroxide is used in petrol refining, which is option (D). \[ \boxed{\text{(D) }\text{Sodium hydroxide}} \]
Crude petroleum fractions contain acidic impurities such as hydrogen sulphide, thiols and naphthenic acids.
Step 2: How they are removed
Washing the fractions with aqueous sodium hydroxide (caustic washing) converts these acids into water-soluble sodium salts, which are then separated.
Step 3: Result
So sodium hydroxide is used in petroleum refining. It is also used in making soap, paper and rayon.
Final Answer:
Sodium hydroxide is used in petrol refining, which is option (D). \[ \boxed{\text{(D) }\text{Sodium hydroxide}} \]
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