Following reaction (s) is /are involved in the iodometric estimationA. `Cr_(2)O_(7)^(2-) +H^(+)+I^(-) to 2Cr^(3+)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`B. `MnO_(4)^(-)+H^(+)+I^(-) toMn^(2+)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`C. `MnO_(4)^(-)+OH^(-)+I^(-)to MnO^(2)+I_(2),I_(2)+S_(2)O_(3)^(2-) to S_(4)O_(6)^(2-)+I^(-)`D. `Cr_(2)O_(7)^(2-)+OH^(-)+I^(-) to 2Cr^(3+)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`

Following reaction (s) is /are involved in the iodometric estimationA.

1.	Following reaction (s) is /are involved in the iodometric estimationA. `Cr_(2)O_(7)^(2-) +H^(+)+I^(-) to 2Cr^(3+)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`B. `MnO_(4)^(-)+H^(+)+I^(-) toMn^(2+)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`C. `MnO_(4)^(-)+OH^(-)+I^(-)to MnO^(2)+I_(2),I_(2)+S_(2)O_(3)^(2-) to S_(4)O_(6)^(2-)+I^(-)`D. `Cr_(2)O_(7)^(2-)+OH^(-)+I^(-) to 2Cr^(3+)+I_(2),I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(-)`
Answer» Correct Answer - AB

Discussion

No Comment Found

Related InterviewSolutions

(T) imparts violet colour in the flame test `overset("compound"(U)+conc.H_(2)SO_(4))to(V)_("Red gas")overset(NaOH+AgNO_(3))to(W)_("Red ppt.")overset(NH_(3)" soln")to(X)` `(W)_("Red ppt.")overset(dil.HCl)to(Y)_("White ppt.")` `(U)` Sublimes on heating `underset(Delta)overset(NaOH)to(Z)_(gas)` Identify (T) to (Z).A. `T=KMnO_(4),U=HCl,V=Cl_(2),W=HgI_(2),X=Hg(NH_(2))NO_(3),Y=Hg_(2)Cl_(2),Z=N_(2)`B. `T=K_(2)Cr_(2)O_(7),U=NH_(4)Cl,V=CrO_(2)Cl_(2),W=Ag_(2)CrO_(4),X=[Ag(NH_(3))_(2)]^(+),Y=AgCl,Z=NH_(3)`C. `T=K_(2)CrO_(4),U=KCl,V=CrO_(2)Cl_(2),W=HgI_(2),X=Na_(2)CrO_(4),Y=BaCO_(3),Z=NH_(4)Cl`D. `Y=K_(2)MnO_(4),U=NaCl,V=CrO_(3),W=AgNO_(3),X=(NH_(4))_(2)CrO_(4),Y=CaCO_(3),Z=SO_(2)`
Identify (A),(B) and (C). Also explain colour difference between `MCl_(4)` and (B).
When `AgNo_(3)`(aq)` reacts with excess of iodine, we get:A. `AgIO_(3)`B. `HIO_(3)`C. `AgO`D. `HI`
Which of the following halides react(s) with `AgNO_(3(aq))` to give a precipitate that dissolves in `Na_(2)S_(2)O_(3(aq))`A. `HCl`B. `HF`C. `HBr`D. `Hl`
What happen when silver nitrate solution is added to `Na_(2)S_(2)O_(3)` solution and then content is allowed to keep for a longer period?
`Na_(2)S_(2)O_(3)` can be prepared by:A. `Na_(2)SO_(3)` solution + `S("powder")overset("Boiled")to`B. `S+NaOHto`C. `Na_(2)S+Na_(2)CO_(3)+SO_(2)to`D. all of the above.
What takes place when zinc metal is added to an aqueous solution containing magnesium nitrate and silver nitrate? (P). Zn is oxidized (Q). `Mg^(2+)` is reduced. (R). `Ag^(+)` is reduced. (S). No reaction takes place.A. P and Q onlyB. P and R onlyC. P,Q and R onlyD. S only
In the galvanizing process, iron is coated with zinc. The resulting chemical protection is most similar to that provided when:A. a magnesium bar is connected to an iron pipeB. an iron can is plated with tinC. copper pipes are connected using lead solderD. a copper pipe is covered with epoxy paint.
Which metal in the first series of transition metals exhibits+1 oxidation state most frequently and why?A. ScB. TiC. CuD. Ag
How would you account for the following: (i) `Cr^(2+)` is reducing in nature while with the same d-orbital configuration `(d^(4)) Mn^(3+)` is an oxidising agent (ii) In a transition series of metals, the metal which exhibits the greatest number of oxidation state occurs in the middle of the series.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment