What are alloys? Name an important alloy...

What are alloys? Name an important alloy which contains some of the lanthanoid metals . Mention its uses.

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An alloy is homogeneous mixture of two or more metals or metals and non-metals. An important alloy containing lanthanoids metals is mischmetal which contain `95%` lanthanoid metal an `5%` iron alogwith traces of `S,C,Ca` and `Al` . It is used in `Mg`-based alooy to produced bullets, shells and lighter fints.

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(a) Why do transition elements show variable oxidation states? (i) Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30). (ii) Name the element which shows only + 3 oxidation state. (b) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.

What is Lanthanoid contraction? Name an alloy which contains some of the lanthanoids elements.

Knowledge Check

Which one of the following alloys contains some of the lanthanoid metals ?

A

Mischmetal

B

Brass

C

Bronze

D

Ziggler-Natta

An alloy which does not contain copper is

A

solder

B

bronze

C

brass

D

bell metal.

An alloy which does not contain copper is

A

Solder

B

Bronze

C

Brass

D

Bell metal

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Misch metal alloy contains about 95% lanthanoid/actinoid metais.

What are alloys? List two properties of alloys.

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