(a) What happens when

(i) chlorine gas is passed through a hot concentrated solution of NaOH?

(ii) sulphur dioxide gas is passed through an aqueous solution of a Fe (III) salt?

(i) What is the basicity of ${H}_{3}P{O}_{3}$ and why?

(ii) Why does fluorine not play the role of a central atom in interhalogen compounds?

(iii) Why do noble gases have very low boiling points?

Concept Videos :-

#6 | 16th Group

Concept Questions :-

group 16,preparation and properties

(a) (i)$3C{l}_{2}+6NaOH\stackrel{Heat}{\to }5NaCl+NaCI{O}_{3}+3{H}_{2}O$

(ii) $S{O}_{2}+F{e}_{2}{\left(S{O}_{4}\right)}_{3}+2{H}_{2}O\to 2FeS{O}_{4}+2{H}_{2}S{O}_{4}$

(b) (i) Basicity of ${H}_{3}P{O}_{3}=2$

Because basicity is the number of replaceable ${H}^{+}$ ions in an acid and ${H}_{3}P{O}_{3}$ is a Dibasic acid.

(ii) Because F being smaller, it cannot accomodate larger sized other halogen atoms around it. Due to the absence of d-orbitals, F does not show positive oxidation state of +3, +5, +7 needed for the formation of polyatomic interhalogen compounds.

(iii) Because the atoms of these elements are held together by weak van der Waal's forces of attraction.

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