Rubber is coagulated from latex by adding ______.
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Hydrochloric acid
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Acetic acid
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Sulphuric acid
-
Carbonic acid
B
Correct answer
Explanation
Rubber latex is coagulated using acetic acid to separate the solid rubber from the liquid serum. The acid neutralizes the negative charges on rubber particles, causing them to clump together. Strong acids like hydrochloric or sulphuric acid would degrade the rubber quality.