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Give some uses of (application) of d- an...

Give some uses of (application) of d- and f-block elements.

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The important uses of lanthanides are given below.
(i) They do not find any use in pure state. They are used in production of alloy steels to improve the strength and workability of steel. A well known alloy is misch-metal which is used in making magnesium based alloy (Mg mixed with 3% of misch-metal). This is purophoric alloy which is used in making bullets, shells and lighter flints.
(ii) Their oxides are used in glass industry for polishing glass and making coloured glass for goggles and television screens.
(iii) Mixed oxides of lanthanides are used in petroleum cracking .
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