Cet Objective Question Cet Objective Question On

CET OBJECTIVE QUESTION ON
1. CONCEPTS IN ORGANIC CHEMISTRY 2. SYNTHETIC ORGANIC CHEMISTRY 3. ISOMERISM – II 4. HYDROCARBONS – II 5. HALOALKANES
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1.The inductive effect a. Implies the atoms ability to cause bond polarization b. Increases with increase in distance c. Implies the transfer of lone pair of electrons from more electronegative atom to the lesser electronegative atom in a molecule d. Implies the transfer of lone pair of electrons from lesser electronegative atom to more electronegative atom in a molecule Vikasana - CET 2012

2. The oxygen atom in phenol a. Exhibits only inductive effect
b. Exhibits only resonance effect
c. Has more dominating resonance effect then inductive effect
d. Has more dominating inductive effect than resonance effect
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3. The activating effect of –OCH3 group attached to the benzene ring can be explained in terms of a. +R effect
b. –R effect
c. + E effect
d. – I effect
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4. Orbital interaction between sigma bonds of a substituent group and a neighboring π– orbital is known as a. Sterric effect
b. Inductive effect
c. Electromeric effect
d. Hyperconjugation effect
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5. Amongst the following the most basic compound is
a. Aniline b. Benzyl amine c. p – nitroaniline d. Acetanilide
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6. The group which exerts both +R and –R effect is

a. –NO2

b. –NHR

c. – NO

d. –OCH3

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7. For an optically active compound, which of the following requirement is necessary? a. A double bond
b. Presence of one chiral carbon
c. Presence of plane of symmetry
d. none of these
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8 A compound with molecular formula C7H16 shows optical isomerism, the compound will be a. 2, 3-dimethylpentane b. 2, 2-dimethylpentane c. 2-methylhexane d. None of these
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9. In the reaction CH3CHO + HCN → CH3CH(OH)CN a chiral centre is produced. Thus product would be a. Meso compound b. Racemic mixture c. Laevorotatory d. Dextrorotatory
Vikasana - CET 2012