TS EAMCET Organic Chemistry: Some Basic Principles and Techniques — practice questions
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Practice TS EAMCET Organic Chemistry: Some Basic Principles and Techniques in the app →Which type of bond transmits the inductive effect along a carbon chain?Alkyl groups attached to a carbon chain show which electronic effect?How does the inductive effect change as distance from the substituent increases?The inductive effect is best described as which kind of electronic effect?In a polar covalent bond, the more electronegative atom carriesAcetic acid is weaker than formic acid because its methyl groupWhich of these acids is the strongest in water?As an acid becomes stronger, its pKa valueBenzoic acid is stronger than cyclohexanecarboxylic acid because its ring carbons areDiacids are usually stronger because a carboxyl group isA positively charged carbon attached to a +I group becomesAttaching more +I groups to a molecule generallyWhen the attacking reagent is an electrophile, which electromeric effect is generally seen?The concepts of electromeric and mesomeric effects are now absorbed into which broader term?A carbocation is an ion containingWhat is the usual hybridisation of the positive carbon in a simple carbenium ion?The LUMO on the charged carbon of a planar carbenium ion isHow many valence electrons surround the positive carbon of a carbenium ion?What is the coordination number of the charged carbon in a carbonium ion such as CH5+?Extra methyl groups stabilise a carbocation by hyperconjugation as they add moreHyperconjugation is also known asHyperconjugation involves delocalisation of electrons fromBy hyperconjugation, alkenes become more stable whenHyperconjugation is proposed to explain why ethane prefers itsA nucleophile forms bonds byBecause they donate electron pairs, nucleophiles are classed asBetween comparable sulfur and oxygen nucleophiles, which is generally stronger?An ion such as thiocyanate, which can attack through two different atoms, is calledGrignard reagents and organolithium compounds commonly serve asA nucleophilic reaction in which a neutral solvent such as water or an alcohol is the nucleophile is calledWhich of these species behaves as an electrophile?Carbenes and free radicals can act as electrophiles mainly because theyResonance in molecules is also calledCompared with any single contributor, the resonance hybrid isResonance energy is the energy gap between the real molecule andAll resonance contributors of a species must have the sameResonance contributors of a molecule differ from one another only in theA major resonance contributor places any negative charge on theAll carbon-carbon bonds in benzene measure aboutHow many dibromobenzene isomers actually exist?In a carboxylate ion RCOO-, the negative charge isThe better the negative charge of an anion is delocalised, theUnlike typical alkenes, benzene mainly undergoesStructural isomers have the same molecular formula but differ inPropanal and acetone are an example of which type of isomerism?Propan-1-ol and propan-2-ol are related asButanol and diethyl ether are isomers sharing which molecular formula?Which compound is a structural isomer of urea?Wöhler's 1828 urea synthesis started from which salts?Who argued in the 1810s that a regulative force exists in living bodies?In 1824 Wöhler made oxalic acid from which compound?Vitalism said organic substances arise through the action of what?Which carbon compound is generally treated as inorganic?By the rule that organic compounds contain C–H or C–C bonds, which compound counts as organic?Which pair were key compounds in the vitalism debate?Complexes with organic ligands but no C–metal bond are called?Compounds with carbon–phosphorus bonds are called what?What differs between two structural isomers?Skeletal isomerism of an acyclic skeleton is also called what?1-Propanol and 2-propanol show which type of isomerism?Which property typically differs strongly between functional isomers?In stereoisomers, what differs while bonding stays the same?Xylenol, a benzene ring with one OH and two CH3 groups, has how many isomers?The inductive effect operates through which type of bond?Alkyl groups generally tend to show which inductive behaviour?What does the alkyl +I effect do to O–H cleavage in carboxylic acids?Ring carbons in benzoic acid have which hybridisation, aiding its acidity?Groups with +I effect make a molecule more what?Which carbocation is the most stable?Alkene stability rises with the degree of substitution because of what?What is the typical C–C bond length in saturated hydrocarbons?Hyperconjugation delocalises electrons using bonds of what character?Which ethane conformation is more stable?A carbocation is an ion with a positive charge on which atom?What is the CH5+ ion formed by protonating methane called?A carbenium ion usually has what geometry and hybridisation at carbon?Olah observed the tert-butyl carbocation directly using which technique?Which reaction involves a carbocation intermediate?What defines a functional group in a molecule?Which reactions do haloalkanes (except fluorinated ones) readily undergo?Boron compounds often act as what because of partly filled octets?An electrophile forms bonds with nucleophiles by doing what?Electrophiles are classified as which type of Lewis species?Ethene adds Br2 to give which product?What defines a free radical?