Concentrated HCl at 30°C can be stored in a vessel made of ________________________?
Correct answer: D. PTFE and porcelain
- A. None of these
- B. Cast iron and aluminium
- C. Stainless steel and high silicon cast iron
- D. PTFE and porcelain
Explanation
Concentrated hydrochloric acid is highly corrosive to ordinary metals, especially aluminium and many steels. PTFE and porcelain are resistant materials suitable for storing it at about 30°C.
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