What is expected to happen when phosphine gas is mixed with chlorine gas?

  • A
    The mixture will only cool down.
  • B
    $PCl_3$ and $HCl$ will be formed and the mixture will become warm.
  • C
    $PCl_5$ and $HCl$ will be formed and the mixture will become warm.
  • D
    $PH_3Cl_2$ will be formed and the mixture will become hot.

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The bond energies (in $kJ \ mol^{-1}$) of $P-H$,$As-H$,and $N-H$ are respectively:

Among the members of $V$ $A$ group ($N$,$P$,$As$,$Sb$,and $Bi$),which of the following properties shows an increase as we go down from nitrogen to bismuth?

$\underbrace{2NO + O_2}_{(X)} \rightleftharpoons \underbrace{2NO_2}_{(Y)} \underset{heat}{\overset{cold}{\longleftrightarrow}} \underbrace{N_2O_4}_{(Z)}$
$X, Y$ and $Z$ can be described as:

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Which of the following reactions is incorrect?

Extra pure $N_2$ can be obtained by heating :-

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