How does treatment with carbn make metals (such as tungsten and iron) change the

Question

How does treatment with carbn make metals (such as tungsten and iron) change their composition? Select one O a. The carbon is able to collect in the intersticies of the metal lattice and provide a much more stable structure. b. The carbon reacts with these metals to form covalent complexes that are extremely rigid. c. The metal atoms are able to intercalate into the covalent network solid of the carbon lattice and thus able to take on the strength of the covalent network solid O d. There is an interlocking of the metallic solid and the covalent network solid to form a new substance that is stronger than either individually Coke, which is used in the purification of metal from metal oxides, is pure carbon. How does it differ from graphite, which is also pure carbon? Select one 0 a. Coke is an amorphous solid, graphite is a crystalline solid. b. Coke is an allotrope of graphite. O c. Coke and graphite are actually identical to each other. They have different names for historical reasons. O d. Coke is actually a thick, sweet liquid sold commercially in a carbonated form, while graphite is a solid used in pencils

Explanation / Answer

A. Carbon change composition of metal by occupying interstitial site of metal so as to give more stable structures to metal. Hence option 1 is correct.

B. Coke and graphite are both allotropes of carbon. Coke is an amorphous form while graphite is a crystalline form.

Coke is an amorphous solid while graphite is crystalline.

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