The p-Block Ele...

Which of the following interhalogens cannot exist?

An aqueous solution of a halogen salt of potassium reacts with the same halogen $$X_2$$ to give $$KX_3$$, a brown-colored solution, in which halogen exists as $$X^-_3$$ ion, $$X_2$$ as a Lewis acid, and $$X^-$$ as a Lewis base, halogen base is:

Element which never has positive oxidation state in any of its compounds is?

Which of the following statements is true?
(i) The order of acidic strength of haloacid is 
HF>HCl>HBr>HI.
(ii) The order of stability of compounds is 
HF<HCI<HBr<HI.

Halogens are placed in which group of elements in modern periodic table.

$$  { I }_{ 2 }C{ l }_{  6}$$ is formed by the following reaction:

When $$PbO_{2}$$ reacts with conc. $$HNO_{3}$$ , the gas evolved is 

Addition of halogen $$(C{l_2} \ or \ B{r_2})$$ to alkenes goes through formation of :

$$XeF_{6}$$ on hydrolysis never gives:-

Which one of the halogen is prepared by only electrolysis method?