Name the element of group-16 which forms colourless and odourless hydride.

Name the first element of group 16

Name the element of group 13 which forms only covalent compounds.

Name the element of group 13 which only forms covalent compounds.

Name the elements of group 13 which form amphoteric hydroxides.

Name the radioactive element of Group 16 .

The element which forms only one hydride is :

Which of the following compounds is colourless and odourless?

Answer the following : (a) Name of element of group 13 which forms the most stable compound in +1 oxidation state. (b) Name the element of group 13 which has the highest first ionisation enthalpy. ( c) Name the element of group 13 which is used as a reducing agent in metallurgical processes. (d) Name of element of group 13 which can show convalency maximum of four only. Name the compound of aluminium which is used as a germicide and coagulant of the purification of water. (f) Name the first two elements of group 13 .