A 'p'-block element $(\mathrm{E})$ and hydrogen form a binary cation $\left(\mathrm{EH}_{\mathrm{x}}\right)^{+}$, while $\mathrm{EH}_3$ on treatment with $\mathrm{K}_2 \mathrm{HgI}_4$ in alkaline medium gives a precipitate of basic mercury(II)amido-iodine. Given below are first ionisation enthalpy values $\left(\mathrm{kJ} \mathrm{mol}^{-1}\right)$ for first element each from group 13, 14, 15 and 16. Identify the correct first ionisation enthalpy value for element E.

Consider a solution of $\mathrm{CO}_2(\mathrm{~g})$ dissolved in water in a closed container.

Which one of the following plots correctly represents variation of log (partial pressure of $\mathrm{CO}_2$ in vapour phase above water) $[y$-axis $]$ with $\log$ (mole fraction of $\mathrm{CO}_2$ in water) $[x$-axis $]$ at $25^{\circ} \mathrm{C}$ ?

$$ \text { Match the LIST-I with LIST-II } $$

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">NH</mi>

</mrow>

<mn>2</mn>

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">NH</mi>

</mrow>

<mn>2</mn>

<mi data-mjx-auto-op="false">KOH</mi>

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">NH</mi>

</mrow>

<mn>2</mn>

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">NH</mi>

</mrow>

<mn>2</mn>

<mi data-mjx-auto-op="false">KOH</mi>

<mi data-mjx-auto-op="false">Ag</mi>

<mrow data-mjx-texclass="INNER">

  <mo data-mjx-texclass="OPEN">(</mo>

  <msub>

    <mrow data-mjx-texclass="ORD">

      <mi data-mjx-auto-op="false">NH</mi>

    </mrow>

    <mn>3</mn>

  </msub>

  <mo data-mjx-texclass="CLOSE">)</mo>

</mrow>

<mn>2</mn>

<mi data-mjx-auto-op="false">OH</mi>

<mi data-mjx-auto-op="false">Ag</mi>

<mfenced open="(" branch_open="(" close=")" branch_close=")" separators="|">

  <mrow>

    <msub>

      <mrow data-mjx-texclass="ORD">

        <mi data-mjx-auto-op="false">NH</mi>

      </mrow>

      <mn>3</mn>

    </msub>    

  </mrow>    

</mfenced>

<mn>2</mn>

<mi data-mjx-auto-op="false">OH</mi>

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">CuSO</mi>

</mrow>

<mn>4</mn>

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">CuSO</mi>

</mrow>

<mn>4</mn>

<mi data-mjx-auto-op="false">Zn</mi>

<mi data-mjx-auto-op="false">Hg</mi>

<mi data-mjx-auto-op="false">HCl</mi>

<mi data-mjx-auto-op="false">Zn</mi>

<mi data-mjx-auto-op="false">Hg</mi>

<mi data-mjx-auto-op="false">HCl</mi>

Choose the correct answer from the options given below :

Given below are two statements :

Statement I : The Henry's law constant $\mathrm{K}_{\mathrm{H}}$ is constant with respect to variations in solution's concentration over the range for which the solution is ideally dilute.

Statement II : $\mathrm{K}_{\mathrm{H}}$ does not differ for the same solute in different solvents.

In the light of the above statements, choose the correct answer from the options given below