Carbon exhibits catenation, whereas silicon does not. Explain.

Explain: Catenation

Cinnabar (HgS) and galena (PbS) on roasting. often given their respective metals, but zinc blende (ZnS) does not. Explain.

Compounds having the same molecular formula exhibit different properties is called isomerism. Explain different types of isomerism with examples.

Which among the following statements are correct? (i) Carbon monoxide is neutral whereas SO_(3) is acidic (ii) Potassium oxide is basic whereas nitrous oxide is acidic (iii) Aluminium and zinc oxides are amphoteric (iv) Sulphur trioxide is acidic whereas phosphorus pentoxide is basic (v) Carbon dioxide is netural whereas sulphur dioxide is amphoteric

All halogens except fluorine exhibits +1,+3, +5 and +7 oxidation states in addition to -1 oxidation state. Explain.

Why does not silicon form an analogue of graphite? OR Why does elemental silicon not form graphite like structure as carbon does? Explain.

Why carbon forms covalent compounds whereas lead forms ionic compounds.

AlF_3 is a high melting solid whereas SiF_4 is a gas. Explain.