General Organic Chemistry PYQs Set 14 (PDF)

Set 14 of 22 · Questions 391-420 of 650

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Mere Teacher · Previous Year Questions NEET Chemistry · General Organic Chemistry · Set 14 (Q391-420)
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391. $Among the following marked proton of which compound shows lowest p K_{a} value ?$ (1) $H_{2} C H - C O O H$ (2) $H_{2} C H - C (= O) - C H_{3}$ (3) (4) 392. $Following reaction (CH3)3CBr + H2O \to (CH3)3COH + HBr is an example of :$ (1) $Elimination reaction$ (2) $Free radical substitution$ (3) $Nucleophilic substitution$ (4) $Electrophilic substitution$ 393. $The number of stereoisomers possible for a compound of the molecular formula C H_{3} -CH=CH-CH(OH)-Me is:$ (1) $2$ (2) $4$ (3) $6$ (4) $3$ 394. $The synthesis of alkyl fluorides is best accomplished by :$ (1) $Free radical fluorination$ (2) $Sandmeyer's reaction$ (3) $Finkelstein reaction$ (4) $Swarts reaction$ 395. $3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is :$ (1) $Zero$ (2) $Two$ (3) $Four$ (4) $Six$ 396. $The number of π -bonds and σ -bonds present in naphthalene are respectively$ (1) $6,19$ (2) $5,19$ (3) $5,11$ (4) $5,20$ 397. $The IUPAC name of the following compound is :$ (1) $4, 4 -Dimethyl - 3 -hydroxybutanoic acid$ (2) $2-Methyl - 3 -hydroxypentan-5-oic acid$ (3) $3 -Hydroxy- 4 -methylpentanoic acid$ (4) $4-Methyl - 3 -hydroxypentanoic acid$ 398. $The IUPAC name for the following compound is:$ (1) $3 -methyl- 4 -(3 -methylprop-l-enyl)-I-heptyne$ (2) $3, 5 -dimethyl- 4 -propylhept- 6 -en-l-yne$ (3) $3 -methyl- 4 -(1 -methylprop- 2 -ynyl)-l-heptene$ (4) $3, 5 -dimethyl- 4 -propylhept- 1 -en- 6 -yne$ 399. $The correct IUPAC name of the following compound is :$ (1) $4-methyl-2-nitro-5-oxohept-3-enal$ (2) $4-methyl-5-oxo-2-nitrohept-3-enal$ (3) $4-methyl-6-nitro-3-oxohept-4-enal$ (4) $6-formyl-4-methyl-2-nitrohex-3-enal$ 400. $What is the IUPAC name of the following compound?$ (1) $3 -Bromo- 1, 2 -dimethylbut- 1 -ene$ (2) $3 -Bromo- 3 -methyl- 1, 2 -dimethylprop- 1 -ene$ (3) $2 -Bromo- 3 -methylpent- 3 -ene$ (4) $4 -Bromo- 3 -methylpent- 2 -ene$ 401. $In which of the following compounds, the C—CI bond ionisation shall give most stable carbonium ion?$ (1) (2) (3) (4) 402. $During dehydration of alcohols to alkenes by heating with concentrated H2SO4 the initation step is$ (1) $Protonation of alcohol molecule$ (2) $Formation of carbocation$ (3) $Elimination of water$ (4) $Formation of an ester$ 403. $IUPAC name of (CH_{3})_{3} CCl$ (1) $3-chlorobutane$ (2) $2-chloro-2-methylpropane$ (3) $t -butyl chloride$ (4) $n -butyl chloride.$ 404. $The number of chiral centres in penicillin is$ (1) $3.00 to 3.00$ (2) $2.00 to 2.00$ (3) $1.00 to 1.00$ (4) $None of these$ 405. $The most stable carbocation from the following is:$ (1) (2) (3) (4) 406. $Common name of Benzene - 1, 2 - diol is -$ (1) $catechol$ (2) $o-cresol$ (3) $quinol$ (4) $resorcinol$ 407. $The purification method based on the following physical transformation is: (X) Solid Heat (X) Vapour Cool (X) Solid$ (1) $Distillation$ (2) $Extraction$ (3) $Sublimation$ (4) $Crystallization$ 408. $What is IUPAC name of following compound?$ (1) $1-Methoxy-3,3-dimethylcyclobutane$ (2) $3-Methoxy-1,1-dimethylcyclobutane$ (3) $3,3-Dimethylcyclobutoxymethane$ (4) $1-Methoxy-3-isoproylbutane$ 409. $Number of σ and π bonds present in ethylene molecule is respectively:$ (1) $4 and 1$ (2) $5 and 2$ (3) $3 and 1$ (4) $5 and 1$ 410. $The IUPAC name of the following compound is$ (1) $trans-2-chloro-3-iodo-2-pentene$ (2) $cis-3-iodo-4-chloro-3-pentene$ (3) $trans-3-iodo-4-chloro-3-pentene$ (4) $cis-2-chloro-3-iodo-2-pentene$ 411. $The number of optically active products obtained from the complete ozonolysis of the given compound is:$ (1) $0$ (2) $1$ (3) $2$ (4) $4$ 412. $The major product obtained in the following reaction is:$ (1) (2) (3) (4) 413. $Consider the following reaction Propanal + Methanal = The correct statement for product B is. It is$ (1) $optically active and adds one mole of bromine$ (2) $racemic mixture and is neutral$ (3) $racemic mixture and gives a gas with saturated N a H C O_{3} solution$ (4) $optically active alcohol and is neutrall$ 414. $The treatment of CH3MgX with CH3C\equivC-H produces$ (1) $CH3C\equivC-CH3$ (2) $C H_{3} - C (H) = C (H) - C H_{3}$ (3) $C H_{4}$ (4) $C H_{3} -CH= C H_{2}$ 415. $Total number of stereo isomers possible for the given structure :$ (1) $2$ (2) $4$ (3) $3$ (4) $8$ 416. $Which among the following is the strongest acid ?$ (1) $C H_{3} C H_{2} C H_{2} C H_{3}$ (2) (3) (4) 417. $What is the correct order of acidity of the protons marked A-D in the given compounds ?$ (1) $H_{C} > H_{D} > H_{B} > H_{A}$ (2) $H_{c} > H_{D} > H_{A} > H_{B}$ (3) $H_{D} > H_{c} > H_{B} > H_{A}$ (4) $H_{C} > H_{A} > H_{D} > H_{B}$ 418. $How many chain isomers could be obtained from the alkane C_{6} H_{14} ?$ (1) $Four$ (2) $Five$ (3) $Six$ (4) $Seven$ 419. $2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly?$ (1) $1-Bromo-3-methylbutane$ (2) $1-Bromo-2-methylbutane$ (3) $2-Bromo-3-methylbutane$ (4) $2-Bromo-2-methylbutane$ 420. $What is the IUPAC name of the following compound?$ (1) $2-Bromo-3- methylpent-3-ene$ (2) $3-Bromo-1, 2-dimethylbut-1-ene$ (3) $4-Bromo-3- methylpent-2-ene$ (4) $3-bromo-3-methyl-1, 2-dimethyprop-1-ene$