Which type of compounds show high melting and boiling points

${H_2}C = CH - CH = C{H_2}\xrightarrow[{0{\,^o}C}]{{HBr}}$ $\begin{array}{*{20}{c}}
{{H_2}C = CH - CH - C{H_3}} \\
{\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Br\,\,\,\,\,\,}
\end{array}\xrightarrow{{ + 25{\,^o}C}}$ $\begin{array}{*{20}{c}}
{C{H_2}CH = CHC{H_3}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$

These provide an example of $......1......$ control at low temperature and $......2......$ control at higher temperature

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In compound $A$, $1.00 \,g$ nitrogen unites with $0.57 \,g$ oxygen. In compound $B$, $2.00 \,g$ nitrogen combines with $2.24\, g$ oxygen. In compound $C$, $3.00 \,g$ nitrogen combines with $5.11\, g$ oxygen. These results obey the following law

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For elements $B , C , N , Li , Be , O$ and $F$ the correct order of first ionization enthalpy is

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Ethylene reacts with ozone to give

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Which of the following is dependent on temperature ?

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At higher altitude, boiling point of water is $95\,^oC$. The amount of $NaCl$ added to $1\, kg$ of water $(K_b = 0.52\, K\, mol^{-1}kg)$ in order to raise the boiling point of solution to $100\,^oC$ ......... $gm$. (assuming $90\%$ ionisation of $NaCl$)

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