Organic Chemistry

Match each class of alkanol listed on the left with its characteristic oxidation behavior on the right when reacted with acidified potassium heptaoxodichromate(VI) solution.

Which of the following structural isomers of hexane, $C_6H_{14}$, contains exactly one tertiary carbon atom?

But-2-ene exhibits geometric (cis-trans) isomerism because each carbon atom involved in the double bond is bonded to two non-identical groups, whereas but-1-ene does not exhibit geometric isomerism.

Match each chemical process or reaction involving alkanes and petroleum refining in Column A with its corresponding chemical description or primary purpose in Column B.

Match each chemical transformation involving alkanols listed on the left with the appropriate reagent, enzyme, or catalyst required on the right.

What is the IUPAC name of the organic compound formed by the reduction of butan-2-one using lithium tetrahydridoaluminate(III) ($LiAlH_4$)?

Compound $W$ is a four-carbon carbonyl compound that yields a negative result when tested with ammoniacal silver nitrate solution. Complete reduction of compound $W$ using lithium aluminium hydride ($\text{LiAlH}_4$) produces an alcohol, compound $Z$. What is the IUPAC name of compound $Z$?

In electrophilic aromatic substitution, benzene reacts with strong electrophiles generated by specific catalyst-reagent combinations. Match each benzene reaction system on the left with its corresponding active electrophile species generated during the reaction mechanism on the right.

An unknown organic compound $Y$ forms a brick-red precipitate when warmed with Fehling's solution and also gives a yellow precipitate of triiodomethane ($CHI_3$) when treated with iodine in sodium hydroxide solution. Which of the following compounds is $Y$?

Which of the following alkenes with the molecular formula $C_5H_{10}$ exhibits geometric (cis-trans) isomerism?

An organic compound with the molecular formula $C_4H_{10}O$ forms four isomeric alkanols. Which of these alkanol isomers contains an asymmetric carbon atom and exhibits optical isomerism?

An organic compound $Z$ with the molecular formula $C_5H_{10}O$ gives a positive orange precipitate when treated with 2,4-dinitrophenylhydrazine. When warmed with acidified potassium heptaoxodichromate(VI) ($K_2Cr_2O_7$), compound $Z$ is readily oxidized to a carboxylic acid containing five carbon atoms. Upon reduction with lithium tetrahydridoaluminate(III) ($LiAlH_4$), compound $Z$ yields a primary alcohol that exhibits optical activity (chirality). What is the IUPAC name of compound $Z$?

An organic compound $Z$ with the molecular formula $C_5H_{10}O$ gives a negative result with Tollen's reagent and does not form a yellow precipitate when warmed with iodine in sodium hydroxide solution. Upon reduction with lithium tetrahydridoaluminate(III) ($LiAlH_4$), compound $Z$ yields a secondary alkanol. Which of the following is the correct IUPAC name of compound $Z$?

Match each chemical reaction or test involving carbonyl compounds in Column A with its corresponding characteristic visual outcome in Column B.

Which of the following organic compounds acts as a weak base in an aqueous solution due to the presence of an unshared pair of electrons on its nitrogen atom?

Match each nitrogen-containing organic compound on the left with its correct structural classification on the right.

An unknown disaccharide $X$ with the molecular formula $\text{C}_{12}\text{H}_{22}\text{O}_{11}$ does not reduce Fehling's solution. Upon acid-catalyzed hydrolysis, $X$ yields an equimolar mixture of two isomeric hexoses, $Y$ and $Z$. Compound $Y$ rapidly produces a deep red color when heated with Seliwanoff's reagent, whereas compound $Z$ is oxidized by bromine water to form a monocarboxylic acid. Which of the following correctly identifies disaccharide $X$ and explains why it fails to react with Fehling's solution prior to hydrolysis?

Four organic substances—starch, nylon-6,6, polyethene, and natural rubber—were analyzed to compare their chemical structures, reaction behaviors, and environmental properties. Which of the following statements provides a correct scientific comparison among these materials?

Match each nitrogen-containing organic compound on the left with the statement on the right that accurately accounts for its aqueous basicity and lone-pair electronic behavior.

Match each organic nitrogen compound on the left with its corresponding relative basicity or acid-base structural property on the right.