Which one of the following belongs to representative group of elements in the periodic table?

Which one of the following elements does not belong to group 14 of the periodic table ?

Which one of the following element is represented as Eka-Silicon in Mendeleev's periodic table?

Select from each of the following sets those elements which belong to the same group of the periodic table ?

Ozone belong to which group of the periodic table ?

Without consulting the periodic table, select from each of the following sets, the elements belonging to same group fo the periodic table.

Ozone belongs to which groups of the periodic table?

Which of the following pair of elements belongs period of the periodic table ?

Which of the following pair of elements belongs period of the periodic table ?