Organic Chemistry Test - 2

Diamond is used as a material for making protective windows in space probes.

The compound given in option (1) is a saturated compound. Rest all the compounds are unsaturated. Thus, option (1) is the odd one out.

Carbon compounds have low boiling points because of the weak inter-molecular forces.

Organic compounds have low melting points.

Carbon forms so many compounds because carbon readily forms covalent bonds with other carbon atoms.

Diamond, graphite, and other forms of carbon are taken directly from mines in the earth. Diamond and graphite can also be made in laboratories. Synthetic diamonds, for example, are made by placing pure carbon under very high pressures (about 800,000 pounds per square inch) and temperatures (about 2,700°C). The carbon is heated and squeezed in the same way organic material is heated and squeezed in the earth. Today, about a third of all diamonds used are synthetically produced.

Compounds of carbon are classified as organic when carbon is bound to hydrogen. Carbon compounds such as carbides (e.g. silicon carbide [SiC₂]), some carbonates (e.g. calcium carbonate [CaCO₃]), some cyanides (e.g. sodium cyanide [NaCN]), graphite, carbon dioxide, and carbon monoxide are classified as inorganic.

Unstable covalent bonding is not a characteristic of carbon because it forms stable covalent bonds with other elements.

C – C bond is the most stable covalent bond among all the given bonds.

The composition roughly is: about 55% butane and 45% propane with traces of iso-pentane and olefins.

Thus, butane is the major constituent of LPG.