On heating lead $(II)$ nitrate gives a brown gas $'A'$. The gas $'A'$ on cooling changes to a colourless solid $'B'$. Solid $'B'$ on heating with $NO$ changes to a blue solid $'C'$. Identify $'A'$,$'B'$ and $'C'$,write the reactions involved,and draw the structures of $'B'$ and $'C'$.
(N/A) $2 \ Pb(NO_3)_2 \xrightarrow{\Delta, 673 \ K} 2 \ PbO + 4 \ NO_2 + O_2$
Gas $'A'$ is $NO_2$ (Brown gas).
Upon cooling,$2 \ NO_2 \rightleftharpoons N_2O_4$. Thus,solid $'B'$ is $N_2O_4$.
$N_2O_4 + NO \xrightarrow{250 \ K} N_2O_3$
Solid $'C'$ is $N_2O_3$ (Blue solid).
Structures:
$N_2O_4$: The structure consists of two $NO_2$ units linked by an $N-N$ bond,showing resonance.
$N_2O_3$: The structure consists of $NO_2$ and $NO$ units linked by an $N-N$ bond,showing resonance.
Gas $'A'$ is $NO_2$ (Brown gas).
Upon cooling,$2 \ NO_2 \rightleftharpoons N_2O_4$. Thus,solid $'B'$ is $N_2O_4$.
$N_2O_4 + NO \xrightarrow{250 \ K} N_2O_3$
Solid $'C'$ is $N_2O_3$ (Blue solid).
Structures:
$N_2O_4$: The structure consists of two $NO_2$ units linked by an $N-N$ bond,showing resonance.
$N_2O_3$: The structure consists of $NO_2$ and $NO$ units linked by an $N-N$ bond,showing resonance.
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Similar Questions
The correct code for stability of oxidation states for given cations is:
$(i)$ $Pb^{2+} > Pb^{4+}, Tl^{+} < Tl^{3+}$
$(ii)$ $Bi^{3+} < Sb^{3+}, Sn^{2+} < Sn^{4+}$
$(iii)$ $Pb^{2+} > Pb^{4+}, Bi^{3+} > Bi^{5+}$
$(iv)$ $Tl^{3+} < In^{3+}, Sn^{2+} > Sn^{4+}$
$(v)$ $Sn^{2+} < Pb^{2+}, Sn^{4+} > Pb^{4+}$
$(vi)$ $Sn^{2+} < Pb^{2+}, Sn^{4+} < Pb^{4+}$
$(i)$ $Pb^{2+} > Pb^{4+}, Tl^{+} < Tl^{3+}$
$(ii)$ $Bi^{3+} < Sb^{3+}, Sn^{2+} < Sn^{4+}$
$(iii)$ $Pb^{2+} > Pb^{4+}, Bi^{3+} > Bi^{5+}$
$(iv)$ $Tl^{3+} < In^{3+}, Sn^{2+} > Sn^{4+}$
$(v)$ $Sn^{2+} < Pb^{2+}, Sn^{4+} > Pb^{4+}$
$(vi)$ $Sn^{2+} < Pb^{2+}, Sn^{4+} < Pb^{4+}$
Which among the following group-$15$ elements does $NOT$ react with concentrated sulphuric acid?
Find the element, which displays greater ability to form $p \pi-p \pi$ multiple bonds to itself and to other elements in the same block.
‘Lapis-Lazuli’ is a blue-coloured precious stone. It is a mineral of the class:
DifficultAIIMS 1980
View SolutionWhat are the boiling and freezing points of nitrogen gas?
Medium
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