MCQ
$KI$ is oxidised into $I_2$ by using the reagent
  • A
    $KMnO_4$ (neutral or slightly alkaline solution)
  • B
    Ozone (alkaline solution)
  • $CuSO_4$ solution
  • D
    All of these

Answer

Correct option: C.
$CuSO_4$ solution
c
$2 CuSO_4 + 4KI \rightarrow K_2SO_4 + Cu_2I_2 + I_2$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

According to Bronsted-Lowry concept, base is a substance which is
A segment of $DNA$ molecule which codes or specifies for one polypeptide chain is called
Select the incorrect match
What will be the decreasing order of basic strength of the following conjugate bases ?
${ }^{-} OH , R \overline{ O }, CH _3 CO \overline{ O }, C \overline{ I }$ 
$\frac{1}{24.63}$ mole of an ideal mono-atomic gas undergoes a reversible process for which $PV^3= C$ where $C (L^3 -$ $atm$) is a constant. The gas expanded from initial volume of $1\, L$ and initial temperature of $300K$ to final volume of $2\, L$ then heat lost to the surroundings by gas is ......$J$
Which of the following has peroxy linkage ?
The name of the product obtained by the addition of $HI$ to propene in presence of peroxide catalyst is
Oxidation number of $N$ in $HN{O_3}$ is
In the scheme given below, the total number of intra molecular aldol condensation products formed from ' $\mathrm{Y}$ ' is 
For each of the following pairs of $E_2$ reaction, select the one that occurs with  the greater rate constant.

$(1)$ $C{H_3}C{H_2}C{H_2}Cl + $ $\begin{array}{*{20}{c}}
  {\,\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ 
  {\,\,\,|} 
\end{array}} \\ 
  {C{H_3} - C - {O^ - }} \\ 
  {\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,C{H_3}} 
\end{array}$                      $(2)$  $C{H_3}C{H_2}C{H_2}I + $$\begin{array}{*{20}{c}}
  {\,\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ 
  {\,\,\,|} 
\end{array}} \\ 
  {C{H_3} - C - {O^ - }} \\ 
  {\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,C{H_3}} 
\end{array}$

$(3)$  $\begin{array}{*{20}{c}}
  {{H_3}C - CH - C{H_3}} \\ 
  {|\,\,\,\,} \\ 
  {Br\,\,\,} 
\end{array}$  $+CH_3O^-$                      $(4)$  $\begin{array}{*{20}{c}}
  {{H_3}C - CH - C{H_3}} \\ 
  {|\,\,\,\,} \\ 
  {Br\,\,\,} 
\end{array}$ $+CH_3S^-$