MCQ
Extra pure $N_2$ can be obtained by heating :-
- A$NH_4NO_2$
- B$(NH_4)_2Cr_2O_7$
- ✓$Ba(N_3)_2$
- D$NH_3$ with $CuO$
✓
Answer
Correct option: C.
$Ba(N_3)_2$
c
Very pure nitrogen can be obtained by the thermal decomposition of sodium or barium azide.
Very pure nitrogen can be obtained by the thermal decomposition of sodium or barium azide.
$2 \mathrm{NaN}_{3} \stackrel{573 \mathrm{K}}{\longrightarrow} 2 \mathrm{Na}+3 \mathrm{N}_{2}$
Azide salt of barium can be obtained in the purest form as well as the decomposition product contains solid Ba as a by-product along with gaseous nitrogen, hence no additional step of
separation is required.
$\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \stackrel{\text { heat }}{\longrightarrow} \mathrm{Ba}+3 \mathrm{N}_{2}$
Hence, option $\mathrm{C}$ is correct.
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
Equivalent weight of $H_3PO_2$ when it dispropertinate in to $PH_3$ and $H_3PO_3$ is
→The magnetic moment (spin only) of $[NiCl_4]^{2-}$ is ....... $B.M.$
→Which of the following alkene on reaction with dil. $H_2SO_4$ does not produce :
→Sulphuric acid reacts with $PCl_5$ to give
→A mixture of ammonia and air at about ${800\,^o}C$ in the presence of $Pt$ gauze forms
→Molarity of a solution containing $1\,g\,\,NaOH$ in $250\,ml$ of solution is ...... $M$.
→$\begin{array}{*{20}{c}}
{C{l_3}\mathop C\limits^3 - \mathop C\limits^2 H = \mathop C\limits^1 {H_2}} \\
{(I)}
\end{array}\,\,\,\,\,\,\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
{{H_3}\mathop C\limits^3 - \mathop C\limits^2 H = \mathop C\limits^1 {H_2}} \\
{(II)}
\end{array}$
→{C{l_3}\mathop C\limits^3 - \mathop C\limits^2 H = \mathop C\limits^1 {H_2}} \\
{(I)}
\end{array}\,\,\,\,\,\,\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
{{H_3}\mathop C\limits^3 - \mathop C\limits^2 H = \mathop C\limits^1 {H_2}} \\
{(II)}
\end{array}$
In addition of $HOBr$ to $(I)$ and $(II)$
A $100\, mL$ solution was made by adding $1.43\, g$ of $Na _{2} CO _{3} \cdot xH _{2} O .$ The normality of the solution is $0.1$ $N.$ The value of $x$ is..........
→(The atomic mass of $Na$ is $23\, g / mol$ ) :
In the electrochemical cell
→${H_2}\left( g \right)\,1atm\,|\,{H^ + }\left( {1M} \right)\,||\,C{u^{2 + }}\left( {1M} \right)\,|\,Cu\left( s \right)$
which of the following statements is true
The rate constant for the decomposition of a hydrocarbon is given as
→$K = \left( {4.5 \times {{10}^{11}}{S^{ - 1}}} \right){e^{ - \left( {28000\frac{{{K^2}mol}}{J}} \right)\frac{R}{T}}}$
The activation energy of reaction (in $J/mol$) is