90 -- Which two compounds are isomers of each other and have a higher boiling point than the other compounds? [Figure: Four organic compounds labeled Alef, B, T, P:
Alef: a carboxylic acid (with OH group on carbonyl)
B: an ester (cyclic, with two C=O groups)
T: a ketone (with C=O in chain, labeled H)
P: a ketone (simple, C=O in chain)
]
(1) ``Alef'' and ``B'' -- ``T''
(2) ``Alef'' and ``T'' -- ``Alef''
(3) ``B'' and ``P'' -- ``T''
(4) ``P'' and ``T'' -- ``Alef''
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\textbf{90 --} Which two compounds are isomers of each other and have a higher boiling point than the other compounds?
\textit{[Figure: Four organic compounds labeled Alef, B, T, P:
\begin{itemize}
\item Alef: a carboxylic acid (with OH group on carbonyl)
\item B: an ester (cyclic, with two C=O groups)
\item T: a ketone (with C=O in chain, labeled H)
\item P: a ketone (simple, C=O in chain)
\end{itemize}]}
\begin{tabular}{ll}
(1) ``Alef'' and ``B'' -- ``T'' & (2) ``Alef'' and ``T'' -- ``Alef'' \\
(3) ``B'' and ``P'' -- ``T'' & (4) ``P'' and ``T'' -- ``Alef''
\end{tabular}
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