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Question
Which statement(s) is/are CORRECT about applications of lanthanoid metals/ions and their compounds?
(I) The optoelectronics applications use lanthanoid ions as active ions in luminescent materials.
(II) Lanthanoid compounds are used in television tubes.
(III) Lanthanoids are used in hybrid cars, superconductors and permanent magnets.
Options
II
III
l, II
I, II, III
MCQ
Solution
I, II, III
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Properties of Lanthanoids
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