Which of the following is true for zero order reaction

$(I)$ $\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{O - S - {C_6}{H_4} - C{H_3}} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}\,$ $(II)$ $\begin{array}{*{20}{c}} {O\,\,\,\,\,\,\,} \\ {||\,\,\,\,\,\,\,} \\ {O - S - {C_6}{H_5}} \\ {||\,\,\,\,\,\,\,} \\ {O\,\,\,\,\,\,\,} \end{array}\,$$(III)$ $N_3$ $(IV)$ $Br$

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Arrange the following in increasing order of their $pK_a$ values

$(x)\begin{array}{*{20}{c}}
{O\,\,\,}\\
{||\,\,\,}\\
{C{H_3} - S - O - H}\\
{||\,\,\,\,}\\
{O\,\,\,\,}
\end{array}$

$\begin{array}{*{20}{c}}
{\,\,\,\,\,O}\\
{\,\,\,\,\,\,||}\\
{(y)\,\,\,C{H_3} - C - O - H}
\end{array}$

$(z)\,\, CH_3 -OH$

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Coordination isomerism is caused by the interchange of ligands between the

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The combustion enthalpy of carbon, hydrogen and methane are $-393.5 ;\, -284.8$ and $-890.4\, kJ/mole$ respectively at $25\,^oC$ . The value of standard formation enthalpies of methane at that temperature is.....$kJ/mole$

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Consider the reaction ${H_2}S{O_3}\left( {aq} \right) + S{n^{4 + }}\left( {aq} \right) + {H_2}O\left( l \right) \to S{n^{2 + }}\left( {aq} \right) + HSO_4^ - \left( {aq} \right) + 3{H^ + }\left( {aq} \right)$ Which of the following statements is correct?

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