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Question

Write the uses of Lanthanides and Actinides.

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Solution

Use of lanthanides

1.A pyrophoric alloy which contains cerium, lanthanum, and Neodymium; iron; aluminium; calcium, carbon, and silicon is used in lighters, toys, flame-throwing tanks, and tracer bullets.

2.Ceria (CeO2) and thoria (ThO2) are used in gas lamp materials.

3.Cerium salts are used in dyeing cotton, lead storage batteries and as a catalyst.

4.Lanthanides are used in metallothermic reactions due to their extraordinary reducing property. Lanthanide - thermic processes can yield sufficiently pure Nb, Zr, Fe, Co, Ni, Mn, Y, W, U, B, and Si.

5. Alloys of Lanthanides are known as mish - metals and the major constituentsof mish-metals are Ce(45-50%), La(25%), Nd(5%) and small quantities of other lanthanide metals and Fe and Ca impurities. Mish-metals are used for the production of brands of steel like heat resistant, stainless and instrumental steels. Mg- alloys containing 30% mischmetal and 1% Zr are useful in making parts of jet engines.

Uses of Actinides

1. U-235 is fissionable, it is used as fuel in nuclear power plants and as a component in nuclear weapons.

2. Plutonium - 238 is used as a power source in long mission space probes.


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