Basics of Organic Chemistry PYQs - Last 10 Years
JEE Main / Chemistry / Organic Chemistry / 250 recent questions
ChemistryOrganic Chemistry2017-2026
Practice 250 JEE Main Chemistry questions from Basics of Organic Chemistry. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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2017-2026
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171 in last 5 years250 in last 10 years
Last 10 Years Basics of Organic Chemistry Questions
Showing 50 of 250 filtered questions.
1Basics Of Organic Chemistry
The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ________.
INTEGER+4 / -12025
2Basics Of Organic Chemistry
The hydrocarbon $(\mathrm{X})$ with molar mass $80 \mathrm{~g} \mathrm{~mol}^{-1}$ and $90 \%$ carbon has _______ degree of unsaturation.
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3Basics Of Organic Chemistry
Identify correct statement/s :
(A) $-\mathrm{OCH}_3$ and $-\mathrm{NHCOCH}_3$ are activating group.
(B) $\quad-\mathrm{CN}$ and -OH are meta directing group.
(C) -CN and $-\mathrm{SO}_3 \mathrm{H}$ are meta directing group.
(D) Activating g...
(A) $-\mathrm{OCH}_3$ and $-\mathrm{NHCOCH}_3$ are activating group.
(B) $\quad-\mathrm{CN}$ and -OH are meta directing group.
(C) -CN and $-\mathrm{SO}_3 \mathrm{H}$ are meta directing group.
(D) Activating g...
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4Basics Of Organic Chemistry
The correct stability order of the following species/molecules is :
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5Basics Of Organic Chemistry
The IUPAC name of the following compound is :
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6Basics Of Organic Chemistry
How many different stereoisomers are possible for the given molecule?
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7Basics Of Organic Chemistry
The incorrect statements regarding geometrical isomerism are :
(A) Propene shows geometrical isomerism.
(B) Trans isomer has identical atoms/groups on the opposite sides of the double bond.
(C) Cis-but-2-ene has higher dipole moment than tr...
(A) Propene shows geometrical isomerism.
(B) Trans isomer has identical atoms/groups on the opposite sides of the double bond.
(C) Cis-but-2-ene has higher dipole moment than tr...
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8Basics Of Organic Chemistry
In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl . The percentage composition of chlorine in the compound is _________ %. (Given : molar mass in $\mathrm{g} \mathrm{~mol}^{-1}$ of $\mathrm...
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9Basics Of Organic Chemistry
The most stable carbocation from the following is :
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10Basics Of Organic Chemistry
Relative stability of the contributing structures is :
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11Basics Of Organic Chemistry
For the given compounds, the correct order of increasing \(\mathrm{pK}_{\mathrm{a}}\) value :
Choose the correct answer from the options given below :
Choose the correct answer from the options given below :
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12Basics Of Organic Chemistry
How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects?
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13Basics Of Organic Chemistry
Correct order of basic strength of Pyrrole , Pyridine and Piperidine is :
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14Basics Of Organic Chemistry
Methods used for purification of organic compounds are based on :
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15Basics Of Organic Chemistry
Total number of stereo isomers possible for the given structure :
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16Basics Of Organic Chemistry
The correct stability order of the following resonance structures of \(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}\) is
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17Basics Of Organic Chemistry
Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below:
In the light of the above statements, choose the most appropriate answer from the options given below:
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18Basics Of Organic Chemistry
The number of optical isomers in following compound is : __________.
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19Basics Of Organic Chemistry
Which of the following are aromatic?
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20Basics Of Organic Chemistry
The number of optically active compounds from the following is _________.
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21Basics Of Organic Chemistry
IUPAC name of following hydrocarbon(X) is :
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22Basics Of Organic Chemistry
Total number of aromatic compounds among the following compounds is ______.
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23Basics Of Organic Chemistry
The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is:
$$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{COOH}, \mathr...
$$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{COOH}, \mathr...
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24Basics Of Organic Chemistry
Which of the following is metamer of the given compound (X) ?
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25Basics Of Organic Chemistry
Functional group present in sulphonic acids is :
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26Basics Of Organic Chemistry
The correct arrangement for decreasing order of electrophilic substitution for above compounds is :
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27Basics Of Organic Chemistry
Number of carbocations from the following that are not stabilized by hyperconjugation is _______.
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28Basics Of Organic Chemistry
The incorrect statement regarding the geometrical isomers of 2-butene is :
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29Basics Of Organic Chemistry
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Cis form of alkene is found to be more polar than the trans form.
Reason (R) : Dipole moment of trans isomer of 2-but...
Assertion (A) : Cis form of alkene is found to be more polar than the trans form.
Reason (R) : Dipole moment of trans isomer of 2-but...
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30Basics Of Organic Chemistry
Using the given figure, the ratio of \(\mathrm{R}_f\) values of sample \(\mathrm{A}\) and sample \(\mathrm{C}\) is \(x \times 10^{-2}\). Value of \(x\) is __________.
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31Basics Of Organic Chemistry
The correct nomenclature for the following compound is :
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32Basics Of Organic Chemistry
Match List - I with List - II.
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overflow:hidden;padding:10px 5px;word-break:norm...
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.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:norm...
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33Basics Of Organic Chemistry
Match List I with List II :
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.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;...
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;...
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34Basics Of Organic Chemistry
The number of different chain isomers for C\(_7\)H\(_{16}\) is __________.
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35Basics Of Organic Chemistry
Which among the following is incorrect statement?
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36Basics Of Organic Chemistry
What will be the decreasing order of basic strength of the following conjugate bases? \({ }^{-} \mathrm{OH}, \mathrm{R} \overline{\mathrm{O}}, \mathrm{CH}_3 \mathrm{CO} \overline{\mathrm{O}}, \mathrm{Cl}\)
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37Basics Of Organic Chemistry
Correct order of stability of carbanion is :
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38Basics Of Organic Chemistry
The total number of 'sigma' and 'pi' bonds in 2-oxohex-4-ynoic acid is ______.
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39Basics Of Organic Chemistry
Given below are two statements:
Statement I: IUPAC name of \(\mathrm{HO}-\mathrm{CH}_2-\left(\mathrm{CH}_2\right)_3-\mathrm{CH}_2-\mathrm{COCH}_3\) is 7-hydroxyheptan-2-one.
Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for above...
Statement I: IUPAC name of \(\mathrm{HO}-\mathrm{CH}_2-\left(\mathrm{CH}_2\right)_3-\mathrm{CH}_2-\mathrm{COCH}_3\) is 7-hydroxyheptan-2-one.
Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for above...
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40Basics Of Organic Chemistry
A species having carbon with sextet of electrons and can act as electrophile is called
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41Basics Of Organic Chemistry
Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is ________.
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42Basics Of Organic Chemistry
The correct order of reactivity in electrophilic substitution reaction of the following compounds is :
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43Basics Of Organic Chemistry
Identify structure of 2,3-dibromo-1-phenylpentane.
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44Basics Of Organic Chemistry
Which of the following molecule/species is most stable?
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45Basics Of Organic Chemistry
Number of geometrical isomers possible for the given structure is/are _________.
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46Basics Of Organic Chemistry
IUPAC name of following compound is :
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47Basics Of Organic Chemistry
Which among the following purification methods is based on the principle of "Solubility" in two different solvents?
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48Basics Of Organic Chemistry
The correct stability order of carbocations is
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49Basics Of Organic Chemistry
The interaction between \(\pi\) bond and lone pair of electrons present on an adjacent atom is responsible for
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50Basics Of Organic Chemistry
Which one of the following will show geometrical isomerism?
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