Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?
Correct answer: B. Sulphuric acid
- A. Nitric acid
- B. Sulphuric acid
- C. Ammonium sulphate
- D. Hydrochloric acid
Explanation
The DCDA process is an improved contact process for sulphuric acid manufacture. It absorbs sulphur trioxide in two stages and thereby reduces its emission before final discharge.
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