Some Basic Principles of Organic Chemistry — practice questions

208 curated practice questions from Some Basic Principles of Organic Chemistry (Chemistry JEE Main, NTA Exams) — 73 medium, 132 easy, 3 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.

• The IUPAC name of ethylidene chloride is: (JEE Main 2022)
• Consider the following organic compound. 1 C H _ 3 - 2 C H _ 2 - 3 C H _ 2 - 4 C H _ 2 - 5 C H _ 2 - 6 C H _ 2 - 7 C H…
• The decreasing order of hydride affinity for following carbocations is: Choose the correct answer from the options…
• Which will undergo deprotonation most readily in basic medium? array l a b c array (Jee Main 2023)
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. Assertion: The…
• The number of structural isomers for C 6 H 14 are:
• In which of the following molecule the resonance effect is not present for lone pair or charge ?
• The hybridization of carbon atoms in C—C single bond of H — C C — CH CH 2 is :
• The name of according to IUPAC nomenclature system is :
• Among these canonical structures of pyridine, the correct order of stability is
• Which of the following statements is correct about methyl group ?
• The compound, whose stereochemical formula is written below, exhibits x geometrical isomers and y optical isomers The…
• Given below are two statements: Statement I: IUPAC name of HO – CH 2 – (CH 2 ) 3 – CH 2 – COCH 3 is 7…
• Among these compounds, which one has shortest C—Cl bond ?
• The correct order in aqueous medium of basic strength in case of methyl substituted amines is: (Jee Main 2023)
• The strongest acid from the following is (Jee Main 2023)
• The correct stability order of the following diazonium salt is (JEE Main 2022) array l (A) (B) (C) (D) array
• The correct order of stability among these canonical structures is
• Identify structure of 2, 3-dibromo-1-phenylpentane. (Jee Main 2024)
• Which conformation of the alkane has the highest potential energy?
• Match List-I with List-II. Choose the correct answer from the options given below:- (Jee Main 2024)
• The incorrect statement regarding the geometrical isomers of 2-butene is: (Jee Main 2024)
• The order of stability of the following carbocations
• The most stable canonical structure among these is
• array l (I) (II) (III) array Among these, positional isomers are
• Heat of hydrogenation of cyclohexene is –28.6 kcal/mol and that of benzene is –49.8 kcal/mol. Then resonance energy of…
• The IUPAC name of CH _ 3 - C CCH ( CH _ 3 )_ 2 is:
• The isomeric deuterated bromide with molecular formula C _ 4 H _ 8 DBr having two chiral carbon atoms is (Jee Main 2023)
• Match List-I with List-II. List-I List-II (A) (I) Spiro compound (B) (II) Aromatic compound (C) (III) Non-planar…
• Stability order among these tautomers is
• Which of the following is most stable? (JEE Main 2022)
• Which among the following is the strongest Bronsted base ? (JEE Main 2022)
• array l I II III IV array Which of the following statements is true about these molecules?
• What is the IUPAC name of the following compound ?
• Which of the following is most stable ? array l I II III IV array
• array l I II III array Which of the following orders is correct for no-bond-resonance energy of these radicals ?
• The possible number of alkynes with the formula C 5 H 8 is
• Which among the following is incorrect statement? (Jee Main 2024)
• The conversion of dextro- or laevo- form into racemic mixture is called
• array l (I) array array l (II) array array l (III) array Among these functional isomers are
• The correct order of increasing acid strength of the compounds (A) CH 3 CO 2 H (B) MeOCH 2 CO 2 H (C) CF 3 CO 2 H (D) is
• The correct configuration name of
• Arrange the following carbocations in decreasing order of stability. (JEE Main 2022) array l A B C array
• The ascending acidity order of the following atoms is (Jee Main 2024)
• According to IUPAC system, the compound is named as (Jee Main 2024)
• Match List-I with List-II. Choose the correct answer from the options given below: (Jee Main 2024)
• Correct statements for the given reaction are: 'B' A. Compound ‘B’ is aromatic B. The completion of above reaction is…
• Which of the following compound may exhibit optical activity ?
• Which of the following compounds can show geometrical isomerism ?
• I II III Which of the following orders is correct for the stability of these carbanions ?
• Which of the structures below would be aromatic? array l (i) (ii) (iii) (iv) array
• Which of the following chemist proposed that a inital force was responsible for the formation of organic compounds?
• The functional group that shows negative resonance effect is: (Jee Main 2024)
• IUPAC name of following compound (P) is: array l (P) array (Jee Main 2024)
• The IUPAC name of the compound is
• Match List-I with List-II. Choose the correct answer from the options given below:- (Jee Main 2024)
• Which of the following is metamer of the given compound (X)? (Jee Main 2024) array l (X) array
• How many isomers are possible with trisubstituted benzene with all the three groups same ?
• Number of chiral carbon atom in
• The correct IUPAC name of the following compound : is
• Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A…
• The order of stability of the following tautomeric compounds is3 array l II III array
• CH _ 3 - O - CH = CH _ 2 HO - CH = CH - CH _ 3 array l (III) array Which among these are tautomers ?
• Of the following compounds, which will have zero dipole moment ?
• The IUPAC name of is
• The IUPAC name of CH 3 CH 2 C(Br) CHCl is :
• Relative stability of the contributing structures is: (Jee Main 2024)
• The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of…
• Which of the following compounds does not exhibit geometrical isomerism ?
• Given below are two statements: Statement I: Aminobenzene and aniline are same organic compounds. Statement II…
• Which of the following pair of structures represent geometrical isomers of each other?
• Which is a pair of geometrial isomers ? (I) (II) (III) (IV)
• The stability order of these canonical structures is
• Given below are two statements. (JEE Main 2022) Statement I: The compound is optically active. Statement II: is mirror…
• Which one of the following will show geometrical isomerism? (Jee Main 2024)
• Correct order of stability of carbanion is – array l a b c d array (Jee Main 2024)
• From the structure of the three stereoisomers of tartaric acid, which statement should be true ? array l (1) (2) (3)…
• Which of the following orders is correct for the stability of these carbanions ?
• For the compounds: (A) H _ 3 C - CH _ 2 - O - CH _ 2 CH _ 2 - CH _ 3 (B) H _ 3 C - CH _ 2 - CH _ 2 - CH _ 2 - CH _ 3…
• Which of the following orders is correct for no-bond- resonance energy of these radicals ?
• This compound can be named as
• CH _ 3 - CH _ 2 - CH _ 2 - CH _ 2 - CH _ 3 array l (II) array array l (III) array Among these, chain isomers are
• When an optically active compound is placed in a 10 dm tube, is present 20 g in a 200 mL solution rotates the plane…
• Arrange the following in decreasing acidic strength. (JEE Main 2022) array l (A) (B) (C) (D) array
• CH _ 2 = C = CH _ 2 In this molecule (allene)
• The correct IUPAC name of the following compound is (JEE Main 2022)
• In the following benzyl/allyl system R - CH = CH _ 2 or (R is alkyl group) decreasing order of inductive effect is
• The number of enantiomers of the compound CH 3 CHBrCHBrCOOH is
• array ccc - NO _ 2 & - Cl & - I I & II & III array Which of these groups has –I effect ?
• Which of the following has highly acidic hydrogen? (Jee Main 2024)
• In the anion, HCOO – the two carbon-oxygen bonds are found to be of equal length. What is the reason for it ?
• The hybridization of carbon atoms in C—C single bond of H - C C - CH = CH _ 2 is :
• The IUPAC name of the compound is :
• The correct order for acidity of the following hydroxyl compound is: A. CH _ 3 OH B. ( CH _ 3 )_ 3 COH Choose the…
• Arrange the carbanions, ( CH _ 3 )_ 3 C , C Cl _ 3 , ( CH _ 3 )_ 2 C H , C _ 6 H _ 5 C H _ 2 in order of their…
• What is the correct order of stability of the given cations: array l II array III IV
• Which one of the following does not have sp 2 hybridised carbon ?
• The suffixes for alcohols, aldehyes and ketones according to IUPAC system are respectively :
• IUPAC name of following hydrocarbon (X) is: (Jee Main 2024)
• Which of the following conformations will be the most stable ? (Jee Main 2023)
• Each of the following compounds show geometrical isomerism except
• How many hyperconjugable H-atoms does this molecule has ?
• The absolute configurations of the two centres in the following molecules are:
• Which of the following carbocations is most stable? (JEE Main 2022)
• The simplest alkene which is capable of exhibiting geometrical isomerism has
• array l (a) (b) (c) (d) array Compare acidic strength:
• The correct statement about the compound A, B and C array l (A) (B) (C) array
• The unsaturation factor of the molecular formula C 5 H 8 O is
• The most stable carbocation for the following is: (Jee Main 2023)
• The number of optical active isomers possible for CH _ 3 CH = C = CHCH _ 3 is
• array l (II) array array l (III) array Among these III is the chain isomer of
• The order of stability of the following carbocations array l CH _ 2 = CH - C H _ 2 ; CH _ 3 - CH _ 2 - C H _ 2 ; (I)…
• Correct order of basic strength of Pyrrole , Pyridine , and Piperidine is: (Jee Main 2024)
• The correct nomenclature for the following compound is: (Jee Main 2024)
• How many asymmetric carbon atoms are present in : (i) 1, 2–dimethyl cyclohexane (ii) 3–methyl cyclopentene (iii)…
• The number of structural isomers for C 6 H 14 is:
• I II III The stability order of these canonical structures is
• The arrangement of (CH 3 ) 3 C—, (CH 3 ) 2 CH—, CH 3 CH 2 — when attached to benzene or unsaturated group in increasing…
• Name of the compound given below is :
• The most unlikely representation of resonance structure of p–nitrophenoxide ion is :
• Number of Stereoisomers for CHO – CHOH – CHOH – CH 2 OH is
• The difference in energy between the actual structure and the lowest energy resonance structure for the given compound…
• The interaction between π-bond and lone pair of electrons present on an adjacent atom is responsible for (Jee Main 2024)
• If unsaturation factor is two, then it means that the structure should have
• In the following structures, which one is having staggered conformation with maximum dihedral angle? (JEE Main 2022)
• The IUPAC name of is :
• An organic compound C 4 H 8 O, is found to be optically active. Which of the following could it be ?
• What is the correct order of acidity of the protons marked A–D in the given compounds ? (Jee Main 2023)
• Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. Assertion: Pyrrole is…
• Given below are two statements : Statement I: Tropolone is an aromatic compound and has 8π electrons. Statement II: π…
• Given below are two statements: Statements I: array l Compound A array IUPAC name of compound is…
• Which of the following orders is correct for the stability of these carbanions ?
• Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: [6]…
• In which of the following molecule the resonance effect is not present?
• The molecular formula of a saturated compound is C 2 H 4 Cl 2 . The formula permits the existence of two
• Which will have the highest enol content? (JEE Main 2022)
• The following compound can exhibit :
• The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is: CH _ 3 CH _ 2…
• The process of separation of racemic mixture into d and  enantiomers is called
• Which of the following is not an example of benzenoid compound ? (JEE Main 2022)
• The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of…
• Increasing order of stability of the resonance structure is: (Jee Main 2023)
• Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
• Among these canonical structures of pyridine, the correct order of stability is
• Which of the following orders is correct for no-bond- resonance energy of these radicals ?
• Which of the following statements is true about this molecule ?
• Among the following compounds, the one which shows highest dipole moment is (Jee Main 2023)
• array l (a) (b) (c) array Compare acidic strength:
• Which of the following compounds is not aromatic? (JEE Main 2022)
• Among the following acids which has the lowest pK a value?
• The two structures (I) and (II) represented below are array l (I) (II) array
• Hybridized carbon atom used in the formation of the compound CH _ 3 - CH = CH - CH _ 2 - CH _ 3 are :
• Hybridized carbon atom used in the formation of the compound CH 3 ­­— CH CH — CH 2 — CH 3 are :
• The IUPAC name of the following compound is :
• CH _ 3 - CH _ 2 - CH = CH _ 2 (II) (III) Which among these are stereo-isomers ?
• The increasing order of p K_ a for the following phenols is (1) 2, 4-Dinitrophenol (2) 4-Nitrophenol (3) 2, 4…
• Match List I with List II. List I(Isomeric pairs) List II (Type of Isomers) A. Propanamine and N-Methylethanamine I…
• The IUPAC name of the compound (CH 3 ) 2 CH – CH = CH – CHOH – CH 3 is :
• In the hydrocarbon, H _ 3 C - 5 C H = 4 C H - 3 CH _ 2 - 2 C 1 C H The state of hybridization of carbons 1,3,5 are in…
• The correct IUPAC nomenclature for the following compound is: (Jee Main 2023)
• Which is a pair of geometrial isomers ? array l (I) (II) (III) (IV) array
• The descending order of acidity for the following carboxylic acid is- A. CH 3 COOH B. F 3 C—COOH C. ClCH 2 —COOH D. FCH…
• Total number of stereoisomers possible for the given structure: (Jee Main 2024)
• Which of the following statements is true about this molecule ?
• Functional group present in sulphonic acids is: (Jee Main 2024)
• How many optical isomers are possible in this compound ?
• Which of the following molecule/species is most stable? (Jee Main 2024)
• An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed…
• Which of the following represents the case of hyperconjugation ?
• 3 CH _ 2 = 2 CH - CN C 1 —C 2 bond of this molecule is formed by
• Ionic reactions with organic compounds proceed through: (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C)…
• Which one of the following substituents at para-position is most effective in stabilizing the phenoxide array l ions?…
• The most stable canonical structure among these is
• Number of and -bonds present in ethylene molecule is respectively : (Jee Main 2024)
• Due to the presence of an unpaired electron, free radicals are
• Which of the following compound will not exhibit geometrical isomerism ?
• Which of the following compounds can exhibit geometrical isomerism ?
• Which of the following structures are aromatic in nature? (JEE Main 2022) array l A B C D array
• For the reactions (I) (II) (III) (IV) The correct decreasing order of enthalpies of reaction for producing carbocation…
• For the given compounds, the correct order of increasing pK _ t value: (Jee Main 2024) (A) (B) (C) (D) (E) Choose the…
• The IUPAC name of CH 3 C(CH 3 ) 2 CH 2 CH CH 2 is :
• In which of the following molecules, all atoms are not coplanar ?
• Which of the following statements is true about these two structures ? array l I II array
• In which of the following molecules, –NO 2 group is not coplanar with phenyl ring ?
• The number of isomers for the aromatic compound C 7 H 8 O (containing benzene ring) are
• The molecular formula of second homologue in the homologous series of mono carboxylic acids is (Jee Main 2024)
• Which of the following is an example of functional isomerism?
• What is the correct order of stability of the given cations: array l I II III IV array
• Rank of the following groups in decreasing order of R, S precedence. array cccc - CH ( CH _ 3 )_ 2 & - CH _ 2 CH _ 2 Br…
• In the compound CH 2 =CH-CH 2 -C≡CH, the C 2 -C 3 bonds is of:
• Which of the following compounds has incorrect IUPAC nomenclature ?
• A species having carbon with sextet of electrons and can act as electrophile is called (Jee Main 2024)
• How many hyperconjugable H-atoms does this molecule has ?
• Match List I with List II List I (Amines) List II (pK b ) A. Aniline I. 3.25 B. Ethanamine II. 3.00 C…
• The correct order of p K_ a values for the following compounds is: array l (a) (b) (c) (d) array (Jee Main 2023)
• How many geometrical and optical isomers are possible in this compound ?
• A pair of optically active compounds which are not the mirror images are called
• The number of isomers of dibromo derivative of an alkene (molar mass 186 g mol -1 ) is
• How many optical isomers are possible in this compound ?
• The correct order of increasing acid strength of the compounds
• Minimum number of C atom for a hydrocarbon, that shows geometrical and optical isomerism:
• I H _ 3 CH _ 3 - C H _ 2 array c CH _ 3 - C H - CH _ 3 III array Which of the following orders is correct for the…
• Consider following structures and write correct statements array l (1) (2) (3) (4) array where R 1 ≠ R 2 ≠ R 3 ≠ R 4
• array l (I) array array l (II) array array l (III) array Among these, I is the chain isomer of
• Which among the following has highest boiling point? (Jee Main 2024)
• The correct stability order of carbocations is (Jee Main 2024)
• Which of the following is most stable array l I IV array
• What is the IUPAC name of the following compound ?

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