Which one of the following compounds can exist as cis-trans isomers?
Some Basic Principles of Organic Chemistry
Every question from past board papers on Some Basic Principles of Organic Chemistry, newest paper first. Open any question for its full worked answer.
NEET UG 2025 question paper (official, booklet 45)
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Among the given compounds I-III, the correct order of bond dissociation energy of C-H bond marked with * is :
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Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula \(\mathrm{C_4H_8O}\) is :
NEET UG 2024 question paper (official, booklet S6)
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The most stable carbocation among the following is:
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A compound with a molecular formula of \(C_6H_{14}\) has two tertiary carbons. Its IUPAC name is:
NEET UG 2022 question paper (official, booklet R6)
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Which statement regarding polymers is not correct ?
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The incorrect statement regarding chirality is :
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The correct IUPAC name of the following compound is :
[skeletal structure with Cl, OH, Br and a methyl branch]
NEET UG 2021 question paper (official, booklet M4)
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The compound which shows metamerism is :
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Which one of the following polymers is prepared by addition polymerisation ?
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The correct structure of 2,6-Dimethyl-dec-4-ene is :
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Match List - I with List - II.
List - I : (a) \(2SO_2(g) + O_2(g) \rightarrow 2SO_3(g)\) (b) \(HOCl(g) \xrightarrow{h\nu} \dot{O}H + \dot{C}l\) (c) \(CaCO_3 + H_2SO_4 \rightarrow CaSO_4 + H_2O + CO_2\) (d) \(NO_2(g) \xrightarrow{h\nu} NO(g) + O(g)\)
List - II : (i) Acid rain (ii) Smog (iii) Ozone depletion (iv) Tropospheric pollution
Choose the correct answer from the options given below.
NEET UG 2020 question paper (official, booklet E1)
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A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following ?
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Elimination reaction of 2-Bromo-pentane to form pent-2-ene is :
(a) \(\beta\)-Elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction
NEET UG 2019 question paper (official, booklet P1)
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The number of sigma (\(\sigma\)) and pi (\(\pi\)) bonds in pent-2-en-4-yne is :
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The biodegradable polymer is :
NEET UG 2018 question paper (official, booklet EE)
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Which of the following molecules represents the order of hybridisation sp\(^2\), sp\(^2\), sp, sp from left to right atoms ?
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Which of the following carbocations is expected to be most stable ?
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Which of the following is correct with respect to \(-\)I effect of the substituents ? (R = alkyl)
NEET UG 2017 question paper (official, booklet B)
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The correct statement regarding electrophile is :
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The IUPAC name of the compound \(OHC-CH(CH_3)-C(=O)-CH=CH-CH_3\) (drawn in skeletal form) is ______.
NEET UG 2016 Phase 1 question paper (official, booklet A)
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Natural rubber has :
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Which of the following is an analgesic ?
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Which of the following biphenyls is optically active ?
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The pair of electron in the given carbanion, \(CH_3C\equiv C^{\ominus}\), is present in which of the following orbitals ?
NEET UG 2016 Phase 2 question paper (official, booklet ZZ)
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In which of the following molecules, all atoms are coplanar?
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Which one of the following structure represents nylon 6,6 polymer?
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In pyrrole [figure: five-membered ring, N1 with H, carbons 2,3,4,5] the electron density is maximum on
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Which among the given molecules can exhibit tautomerism?
