MCQ
Element showing the highest number of oxidation states is :
- ✓Mn
- BNi
- CFe
- DCr
✓
Answer
Correct option: A.
Mn
a
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Lowering of vapour pressure is highest for
An explosive compound $(A)$ reacts with water to produce $NH_4OH$ and $HOCl.$ Then, the compound $(A),$ is
→Conductivity (unit Siemen’s) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is
A solution of $Ph_3CCO_2H$ in conc. $H_2SO_4$ gives $(X)$ when poured into methanol $X$ 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}$
$(3)$ $\begin{array}{*{20}{c}}
{{H_3}C - CH - C{H_3}} \\
{|\,\,\,\,} \\
{Br\,\,\,}
\end{array}$ $+CH_3O^-$ $(4)$ $\begin{array}{*{20}{c}}
{{H_3}C - CH - C{H_3}} \\
{|\,\,\,\,} \\
{Br\,\,\,}
\end{array}$ $+CH_3S^-$
Identify the product in following order
→$3,4,5-$Tribromoaniline $\underset{\text{(ii) }{{H}_{3}}P{{O}_{2}}}{\mathop{\xrightarrow{\text{(i) diazotization}}}}\,\,?$
$\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{A} \xrightarrow{{4\,KO{H_1}{O_2}}}\mathop {2\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{B} }\limits_{(Green)} + 2{H_2}O$
→$3\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{B} \xrightarrow{{4\,HCl}}\mathop {2C}\limits_{(Purple)} + Mn{O_2} + 2{H_2}O$
$3\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{C} \xrightarrow{{{H_2}O,KI}}2\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{A} + 2KOH + \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{D} $
In the above sequence of reactions, $\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{A}$ and $\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{D} $ , respectively are
Number of products in the given reaction :
→${C_6}{H_5}CHO + C{H_3} - CHO\xrightarrow{{\mathop O\limits^\Theta H}}$ Product
will be
Pick out the one which does not belong to the family
The number of water molecule$(s)$ directly bonded to the metal centre in $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is
→