21 Chemistry -- Non-Metals: Carbon

What is meant by allotropy. Give examples of a crystalline allotrope of Carbon.

1 Answers

The substance having same elements in same physical state but different structural arrangement is called allotropes. And the property of an element to exhibit allotropes is called allotropy.
Examples of crystalline form of carbon are diamond, graphite, fullerene etc.

Name the allotrope of carbon which is used for drilling.

Diamond, which is one of the allotropes of carbon, is used for drilling. Diamond is the hardest substance known whose density is3.05 gm/cc. The valence electrons of C are strongly held in a C--C binds. Because of the strong covalent bond in between C--C atoms, diamond is the hardest substance known so far.

What are fullerenes?

Carbon monoxide is used as a reducing agent in metallurgy but not carbon dioxide. Why?

Define the terms 'allotropes' with examples.

The substance having same elements in same physical state but different structural arrangement is called allotropes. Examples: diamond, graphite, alpha sulphur etc.

What happens when carbon monoxide is passed over heated finely divided nickel?

What happens when a piece of burning magnesium is dropped into a jar full of carbondioxide?

What happens when oxalic acid crystals are heated with concentrated sulphuric acid?

Why is carbon used as the most common reducing agent in thermal metallurgy?

What is dry ice? Why it is called so?

Why is that carbon monoxide is extremely poisonous?

Write a chemical reaction to show the reducing action of CO.

How would you convert CO into CO2 and vice versa?

What happens when:Carbon monoxide is heated with hydrogen in presence of ZnO and Cu?Gas obtained by heating oxalic acid and conc. H2SO4 is passed through (i) NaOH solution and (ii) Finely divided N...

What is allotropy? Name the latest discovered allotropic form of carbon.

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