General Introduction of Group 17 Elements

In Hall-Heroult process, the following is used for reducing ${\mathrm{Al}}_2{\mathrm{O}}_3$ :-

Which of the following is not a mineral of fluorine?

Which of the given acids is most acidic in nature?

_____ belongs to the Group-$17$ of the periodic table, which are called halogens.

Group-____ elements are called as halogens.

Which of the following halogen is radioactive in nature?
 

The ${\mathrm{F}}^{-}$ ions make the enamel on teeth much harder
by converting hydroxyapatite (the enamel on the
surface of teeth) into much harder fluoroapatite
having the formula.

Identify the incorrect pair from the following :

Which of the following is an incorrect match?

Match the columns I, II and III and mark the appropriate choice.
 

The bond length $\left(pm\right)$ of $F_2, H_2,C{l}_2 \mathrm{a}\mathrm{n}\mathrm{d}\mathrm{ }{I}_2$ , respectively is

The property which is not true about fluorine is:

The decreasing order of electron affinity is

A radioactive element resembling iodine in properties is

The valence shell electronic structure of an element is ${\mathrm{ns}}^2{\mathrm{np}}^5$. The element will belong to the group of :-