Q.

Best single use of lanthanides is : 

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a

Ln oxides are used as phosphor in television screens and similar fluorescing surfaces

b

production of alloy steels for plates and pipes

c

industrial manufacture of high voltage batteries

d

production of bullets, shell and lighter flint

answer is B.

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Detailed Solution

The manufacturing of alloy steels for plates and pipes is the best single usage of lanthanides. They have been employed to give structural materials strength, hardness, and inertness.

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Best single use of lanthanides is :