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Important questions on Corrosion

Rusting of iron is a chemical reaction. The reaction can be termed as:

A
combination reaction
B
addition reaction
C
both (A) and (B)
D
decomposition
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When metals corrodes, it is being :

A
dissolved into surrounding moisture
B
weakened structurally
C
chemically combined with another metal
D
reacted with oxygen
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Which of the following statements is/are not correct?

This question has multiple correct options
A
cell is called Daniell cell
B
Rust is
C
Saline water slows down rusting
D
Pure metals undergo corrosion faster than impure metals
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When a corroded metal object is rubbed by a sand paper then:

A
outer metal surface is removed
B
metal becomes thin
C
outer corroded layer will be removed
D
all of the above
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In the rusting of iron, iron has been:

A
oxidised
B
reduced
C
vaporised
D
decomposed
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What is corrosion?

A
When metal is gradually destroyed through chemical reactions
B
When metal is created through chemical reactions
C
When a redox reaction takes place
D
When a metal is destroyed after exposure to a gas
E
When a solid is destroyed through chemical reactions
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