Chemistry
Organic Chemistry Fundamentals
287 Questions
Organic chemistry fundamentals cover the structure, properties, and reactions of carbon containing compounds. The questions explore functional groups, isomerism, homologous series, and basic reaction mechanisms. This forms the basis of general chemistry across multiple examination formats.
Functional groupsIsomerism typesHomologous seriesCycloalkanesOrganic monomers
Organic Chemistry Fundamentals Questions
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Isobenzofuran
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Benzoic acid
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Benzoin
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Benzothiazole
D
Correct answer
Explanation
Benzothiazole is an organosulfur compound. It is colourless, slightly viscous liquid. A derivative of benzothiazole is the light-emitting component of luciferin, found in fireflies.
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Benzisothiazolinone
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Benzisoxazole
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Tetracene
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Benzocaine
C
Correct answer
Explanation
Tetracene has the appearance of a pale orange powder. Tetracene is the four-ringed member of the series of acenes.It is a molecular organic semiconductor, used in organic field-effect transistors (OFETs) and organic light-emitting diodes (OLEDs).
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Anthracene
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Anthranilic acid
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Aniline
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Anilinium chloride
A
Correct answer
Explanation
Anthracene is a solid polycyclic aromatic hydrocarbon consisting of three fused benzene rings. It is a component of coal-tar. Anthracene is used in the production of the red dye alizarin and other dyes.
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Bromocresol purple
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2-Bromo-1-chloropropane
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Bromobimane
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Bromobenzene
B
Correct answer
Explanation
2-Bromo-1-chloropropane, C3H6BrCl, is an alkyl halide. This simple compound has a chiral centre and is used sometimes to determine the enantiomeric resolution of simple chromatographic methods.
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2-Butoxyethanol
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Butene
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Butane
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1,3-Butadiene
B
Correct answer
Explanation
Butene is an alkene with the formula C4H8. It is a colourless gas that is present in crude oil as a minor constituent in quantities that are too, small for viable extraction. It is ,therefore, obtained by catalytic cracking of long chain hydrocarbons left during refining of crude oil.
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Acrylic acid
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Acryloyl chloride
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Adamantane
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Adenosine
C
Correct answer
Explanation
Adamantane is a colourless, crystalline chemical compound with a camphor-like odour. Adamantane molecules consist of three cyclohexane rings arranged in an armchair configuration. It is unique in that it is both rigid and virtually stress-free.
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Behenic acid
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Azulene
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Benomyl
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Azobenzene
B
Correct answer
Explanation
Azulene is an organic compound and an isomer of naphthalene. Whereas naphthalene is colourless, azulene is dark blue.
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closo-borane
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nido-boranes
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arachno-borane
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hypho-borane
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None of these
C
Correct answer
Explanation
Arachno-borane has the structural formula- BnHn+6.
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sesterterpenes
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triterpenes
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tetraterpenes
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polyterpenes
B
Correct answer
Explanation
Triterpenes consist of six isoprene units and have the molecular formula C30H48. The linear triterpene squalene, the major constituent of shark liver oil, is derived from the reductive coupling of two molecules of farnesyl pyrophosphate.
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Myrcene
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β-pinene
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Caryophyllene
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Humulene
A
Correct answer
Explanation
Myrcene, or β-myrcene, is an olefinic natural organic compound. It is classified as a hydrocarbon, but more precisely as a monoterpene. Terpenes are dimers of isoprene and myrcene is one of the most important.
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Hemiterpenes
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Monoterpenes
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Sesquiterpenes
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Diterpenes
A
Correct answer
Explanation
Hemiterpenes consist of a single isoprene unit. Isoprene itself is considered the only hemiterpene, but oxygen-containing derivatives such as prenol and isovaleric acid are hemiterpenoids.
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Retinol
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Retinal
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Phytol
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Squalene
D
Correct answer
Explanation
Squalene is a hydrocarbon and a triterpene, and is a natural and vital part of the synthesis of cholesterol, steroid hormones and vitamin D in the human body. Squalene is used in cosmetics, and more recently as an immunologic adjuvant in vaccines.
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Adamantane
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Barbituric acid
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Acenaphthene
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Behenic acid
B
Correct answer
Explanation
Barbituric acid is an organic compound based on a pyrimidine heterocyclic skeleton. It is an odourless powder soluble in water. Barbituric acid is the parent compound of barbiturate drugs, although barbituric acid itself is not pharmacologically active.
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Dimethylamine
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Methylamine
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Trimethylamine
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Methylhexanamine
B
Correct answer
Explanation
Methylamine is an organic compound with formula CH3NH2. This colourless gas is a derivative of ammonia, but with one H atom replaced by a methyl group. It is the simplest primary amine.
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Enantiomers
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Diastereomers
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Configurational stereoisomer
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Conformers
A
Correct answer
Explanation
Enantiomers are two stereoisomers that are related to each other by a reflection. They are mirror images of each other, which are non-superimposable. Human hands are a macroscopic example of stereoisomerism.