Materials and Construction
100% H₂SO₄ at 30°C can't be stored in a vessel made/lined with

Teflon, glass and porcelain
Aluminium, tin and rubber
Mild steel and stainless steel
Cast iron and high silicon iron

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Materials and Construction
Duriron is

Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
Acid resistant, brittle and very hard
All of these
High silicon iron

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