Question

Consider the following materials

1. Nickel
2. Silver
3. Oxygen
4. Aluminium

The correct sequence in the order of decreasing permeability is

a.

1, 4, 3, 2

b.

1, 4, 2, 3

c.

4, 1, 3, 2

d.

4, 1, 2, 3

Answer: (b).1, 4, 2, 3

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Q. Consider the following materials 1. Nickel 2. Silver 3. Oxygen 4. Aluminium The correct sequence in the order of decreasing permeability is

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