MCQ
Red phosphorus can be obtained from white phosphorus by
  • Heating it with a catalyst in an inert atmosphere
  • B
    Distilling it in an inert atmosphere
  • C
    Dissolving it in carbon disulphide and crystallizing
  • D
    Melting it and pouring the liquid into water

Answer

Correct option: A.
Heating it with a catalyst in an inert atmosphere
a
Red phosporous $\left( P _8\right)$ can be obtained from white phosporous by heating to $300$ degree in presence of catalyst and in the absence of air.

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

$E _{ Cu ^{2+} \mid Cu }^{\circ}=+0.34 V$

$E _{ Zn ^{2}+\mid Zn }^{ o }=-0.76 V$

Identify the incorrect statement from the options below for the above cell 

For decolourization of $1$ mole of $KMn{O_4}$, the moles of ${H_2}{O_2}$ required is
$s{p^3}{d^2}$ hybrid orbitals are
What is the activation energy for the reverse of this reaction?

${N_2}{O_4}(g)\, \to \,2N{O_2}(g)$

Data for the given reaction is

$\Delta H = +54\,kJ$ and $E_a = + 57.2\,kJ$

.......$kJ$

Choose the correct statement regarding $SeOCl_2$ molecule
How many compounds gives $CO_2$ with $NaHCO_3$ ?
A mixture of one mole each of $H _{2}, He$ and $O _{2}$ each are enclosed in a cylinder of volume $V$ at temperature $T.$ If the partial pressure of $H _{2}$ is $2$ a$tm,$ the total pressure of the gases in the cylinder is$.......atm$
Ethanol when reacted with $PCl_5$ gives $A$, $POCl_3$ and $HCl$. $A$ reacts with silver nitrite to form $B$ (major product) and $AgCl$. $A$ and $B$ respectively are
Which of the following statements about the assembly of nucleotides in a molecule of deoxyribose nucleic acid $(DNA)$ is correct
Which one of the following is not an intermediate in the generally accepted  mechanism for the reaction shown below ?

$\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{F}_{3}}\,C\,OH+C{{H}_{3}}\,CH\,C{{H}_{3}}  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH  \\
\end{matrix}\xrightarrow{{{H}_{2}}S{{O}_{4}}}\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{F}_{3}}\,C\,OCH\,C{{H}_{3}}+{{H}_{2}}O  \\
   |\,\,\,\,\,\,\,\,\,\,\,\, \,\,\,\, \\
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$