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    Aromaticity DPP 4

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    Subhadeep
    This document contains 20 multiple choice questions related to chemistry concepts like aromaticity, carbocations, and pericyclic reactions. The questions cover topics such as identifying aromatic versus non-aromatic compounds, determining the order of stability of carbocations, predicting products of Diels-Alder and photochemical reactions, and applying Huckel's rule and Craig's rule to analyze aromaticity in cyclic compounds.

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    Aromaticity DPP 4

    Uploaded by

    Subhadeep
    101 views4 pages
    This document contains 20 multiple choice questions related to chemistry concepts like aromaticity, carbocations, and pericyclic reactions. The questions cover topics such as identifying aromatic versus non-aromatic compounds, determining the order of stability of carbocations, predicting products of Diels-Alder and photochemical reactions, and applying Huckel's rule and Craig's rule to analyze aromaticity in cyclic compounds.

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    Aromaticity Dpp 4

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    This document contains 20 multiple choice questions related to chemistry concepts like aromaticity, carbocations, and pericyclic reactions. The questions cover topics such as identifying aromatic versus non-aromatic compounds, determining the order of stability of carbocations, predicting products of Diels-Alder and photochemical reactions, and applying Huckel's rule and Craig's rule to analyze aromaticity in cyclic compounds.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    101 views4 pages

    Aromaticity DPP 4

    Uploaded by

    Subhadeep
    This document contains 20 multiple choice questions related to chemistry concepts like aromaticity, carbocations, and pericyclic reactions. The questions cover topics such as identifying aromatic versus non-aromatic compounds, determining the order of stability of carbocations, predicting products of Diels-Alder and photochemical reactions, and applying Huckel's rule and Craig's rule to analyze aromaticity in cyclic compounds.

    Copyright:

    © All Rights Reserved
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    Download as pdf or txt
    of 4

    CHEMISTRY FOR YOU DPP-4 AROMATICITY

    Q1. Which of the following given statement is/ are correct about fullerene ( C60):
    (a) it is formed by resistive heating of graphite in inert atmosphere.
    (b) it is an aromatic compound.
    (c) it is an non aromatic compound.
    (d) it has only 32- faces, 12 of which are pentagons & 20 of which are hexagons.
    (a) a, b & d (b) a, c & d (c) b, c & d (d) only d
    Q2. Among the bromides (i) to (iii) given below the order of reactivity in S N1 reaction is:

    (a) iii > ii > i (b)ii > iii > I (c) iii> i > ii (d)ii>i> iii
    Q3. Among the following compound which one is Homo aromatic:

    Q4.Following compound is :

    (a) Aromatic (b) anti aromatic (c) Non aromatic (d) Homo aromatic
    Q5. Rate of stability of following carbocation:

    (a) I>II>III
    (b) III>II<I
    (c) III>II>I
    (d) II>III>I
    CHEMISTRY FOR YOU DPP-4 AROMATICITY
    Q6.Anthracene is known to react with maleic anhydride in Diels alder reaction predict which of
    the product shown is obtained & why

    (a) (A) will be the major product due to greater Resonance stability of Napthalene ring ⋍ 61
    kcal/ mole.
    (b) (B) will be the major product due to greater Resonance stability of two Benzene ring ⋍ 72
    kcal/ mole.
    (c) (B) will be the major product due to greater Resonance energy ⋍ 61 kcal/ mole.
    (d) Both A & B will be major because having same Resonance energy.
    Q7.The compound P undergoes a pericyclic reaction under photochemical condition to give
    compound Q. In compound Q the relative stereochemistry and H1-NMR chemical shift values of
    methyl groups (in ppm) respectively are- [ NETJUNE 2019]

    (a) Cis;-5ppm (b) Trans;17ppm (c) Cis;17ppm (d) Trans;-5ppm

    Q7.From the following the pseudo aromatic compound is-

    Q8.Consider the false statement regarding pseudo aromatic compounds


    a. Pseudo aromatic compounds are mono cyclic compounds.
    b. Pseudo aromatic compounds are completely conjugated.
    CHEMISTRY FOR YOU DPP-4 AROMATICITY
    c. Pseudo aromatic compounds are Planar.
    d. Pseudo aromatic compounds are Non planar.
    Q9.Compound which having most acidic proton in nature:

    Q10.Compound which are not aromatic:

    Q11.Compound which are aromatic:

    Q12.In the huckel molecular model for benzene the π e - transition from occupied to unoccupied
    molecular orbital donot occurs at-
    (a) 1β (b) 2β (c) 3β (d) 4β
    Q13.Delocalisation energy per electron in cyclopropenium ion is:
    (a) 1β (b) 2β (c) 3β (d) 4β
    Q14.Order of stability from the following compound is:

    (a) A>B>C (b) C>A>B (c) C>B>A (c) A>C>B


    Q15.
    CHEMISTRY FOR YOU DPP-4 AROMATICITY
    (a) Paramagnetic and its lowest absorption energy is 150KJ/Mole
    (b) Paramagnetic and its lowest absorption energy is 75KJ/Mole
    (c) Diamagnetic and its lowest absorption energy is 150KJ/Mole
    (d) Diamagnetic and its lowest absorption energy is 75KJ/Mole
    Q16.During the following reaction sequence the major product P is:

    (a) Aromatic (b) Anti aromatic (c) Non aromatic (d) Homo aromatic
    Q17.Major product P in the following reaction sequence is :

    (a) Aromatic (b) Anti aromatic (c) Non aromatic (d) Homo aromatic
    ,
    Q18.According to Craig s rule Pentalene is:
    (a) Aromatic (b) Anti aromatic (c) Non aromatic (d) Homo aromatic
    Q19. Consider the statement regarding Craigs rule-
    (A) Craig,s rule is applicable for polycyclic aromatic ring system.
    (B) For to apply Craig,s rule C2- axis must present in the molecule.
    (C) If N – 1 = odd, compound is non-aromatic where N= total number of double bonds.
    (D) If N – 1 = even, compound is aromatic where N= total number of double bonds.
    (a) A &B (b) A,B&C (c) B,C&D (d) A,B,C &D
    Q20. The compound A,B,C are respectively-

    (a) Aromatic, Non aromatic , Anti aromatic


    (b) Aromatic, Anti aromatic ,Non aromatic
    (c) Anti aromatic, Aromatic , Aromatic
    (d) Aromatic, Aromatic ,Aromatic
    Q21.following compound is:

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