For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is__________________?
Correct answer: B. Cast iron
- A. Stainless steel
- B. Cast iron
- C. Aluminium
- D. Nickel
Explanation
Cast iron is widely used for concentrated sulphuric acid because the acid promotes a protective surface film under these conditions. The suitability changes with acid concentration and temperature, so materials suitable for dilute acid may differ.
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