The brown coloured deposition on an iron box when kept in humid air fo – McqOptions

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1.	The brown coloured deposition on an iron box when kept in humid air for some days is called:
A.	Dust
B.	Rust
C.	Hydrogen gas at anode and sodium hydroxide at cathode
D.	All the above
E.	None of these
Answer» C. Hydrogen gas at anode and sodium hydroxide at cathode

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