Solve this-a- Give reasons -i- H3PO3 undergoes disproportionation reaction but H3PO4 does not-ii- When C12 reacts with excess of F2- ClF3 is formed and not FC13-iii- Dioxygen is a gas while Sulphur is a solid at room temperature-

Dear student, i) In H3PO3 , P is in +3 oxidation state whereas in H3PO4 has P in +5 oxidation state. So it can go from + 3 to +5 as well as +1 and hence undergo ...

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Byju's Answer

Standard XII

Chemistry

Physical and Chemical Properties of Hydrogen

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Question

Solve this:

(a) Give reasons :

(i) H₃PO₃ undergoes disproportionation reaction but H₃PO₄ does not.
(ii) When C1₂ reacts with excess of F₂, ClF₃ is formed and not FC1₃.
(iii) Dioxygen is a gas while Sulphur is a solid at room temperature.

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Solution

Dear student,
i) In H₃PO₃ , P is in +3 oxidation state whereas in H₃PO₄ has P in +5 oxidation state. So it can go from + 3 to +5 as well as +1 and hence undergoes disproportion reaction.
ii) Cl in +3 oxidation state will be more stable than + 3 of F atom.So it forms ClF₃ and not FCl₃This is due to electronegavity of fluorine.
iii) Due to pπ-pπ bonding because of which the intermolecular forces in it are weak van der Waals forces . sulphur does not form strong S=S double bonds hence exists as S8 held together by strong covalent bonds and exists as a polyatomic molecule, in which intermolecular forces are strong so, it exists as a solid.
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Similar questions

Q. (a) Give reasons :
(i)

H_{3} P O_{3}

undergoes disproportionation reaction but

H_{3} P O_{4}

does not.

(ii) When

C l_{2}

reacts with excess of

F_{2}, C l F_{3}

is formed and not

F C l_{3} .

(iii) Dioxygen is a gas while Sulphur is a solid at room temperature.

(b) Draw the structures of the following :
(i)

X e F_{4}

(ii)

H C l O_{3}

Q. Give reasons

H_{3} P O_{3}

undergoes disproportionation reaction but

H_{3} P O_{4}

does not.

Q. Give reasons Dioxygen is a gas while Sulphur is a solid at room temperature.

Q. Give reasons When

C l_{2}

reacts with excess of

F_{2}

C l F_{3}

is formed and not

F C l_{3}

Q. Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false.
(i)

C u^{+}

undergoes disproportionation to

C u

and

C u^{2 +}

in aqueous solution.
(ii)

H g_{2} C l_{2}

does not impart chromyl chloride test.
(iii) Sulphide ions react with sodium nitroprusside to form a purple coloured complex. In this reaction, oxidation state of iron changes.

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Solve this: (a) Give reasons : (i) H3PO3 undergoes disproportionation reaction but H3PO4 does not. (ii) When C12 reacts with excess of F2, ClF3 is formed and not FC13. (iii) Dioxygen is a gas while Sulphur is a solid at room temperature.

Solve this:

(a) Give reasons :

(i) H₃PO₃ undergoes disproportionation reaction but H₃PO₄ does not.
(ii) When C1₂ reacts with excess of F₂, ClF₃ is formed and not FC1₃.
(iii) Dioxygen is a gas while Sulphur is a solid at room temperature.