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Some statement(s) is/are given below. ...

Some statement(s) is/are given below.
I. Rust is hydrated ferric oxide
II. Saline water slows down rusting
III. Pure metals undergo corrosion faster than impure metals
IV. Fe does not undergo corrosion when placed in vacuum
Among the above

A

A,B and C are true

B

A and C are false

C

A and D are true

D

B and D are false

Text Solution

Verified by Experts

The correct Answer is:
C
Factors affecting corrosion.
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MARVEL PUBLICATION-ELECTROCHEMISTRY-Test your Grasp
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  3. Electrolysis involves oxidation and reduction respectively at .

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  9. How many electrons are there in one coulomb of electricity?

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  10. The emf of cell is 1.3 Volt. The positive electrode has potential of 0...

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  11. How many Faradays are required to liberate one mole of O(2) gas at N.T...

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  12. A silver cup is plated with silver by passing 965 coulombs of electric...

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  13. A, B,C and D are four elements with E(oxd)^(0) as +2.82V, +2.71V, +1.6...

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  14. During rusting of iron it gets

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  15. The electrode potential of a silver electrode dipped in 0.1 M AgNO(3) ...

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  16. A certain current liberated 0.504 g of hydrogen in 2 hours. How many g...

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  17. The rusting of iron is catalysed by which of the following ?

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