General Organic Chemistry PYQs Set 19 (PDF)

Set 19 of 25 · Questions 541-570 of 724

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Mere Teacher · Previous Year Questions JEE Main Chemistry · General Organic Chemistry · Set 19 (Q541-570)
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541. $Among the following the strongest acid is :$ (1) $CH3COOH$ (2) $C6H5COOH$ (3) $m-CH3OC6H4COOH$ (4) $p-CH3OC6H4COOH$ 542. $The major product obtained in the photo catalyzed bromination of 2-methylbutane is :$ (1) $1-bromo-2-methylbutane$ (2) $1-bromo-3-methylbutane$ (3) $2-bromo-3-methylbutane$ (4) $2-bromo-2-methylbutane$ 543. $Hyperconjugation involves overlap of the following orbitals$ (1) $σ-σ$ (2) $σ-p$ (3) $p - p$ (4) $π - π$ 544. $Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because of :$ (1) $steric hindrance$ (2) $inductive effect$ (3) $instability$ (4) $insolubility$ 545. $In sodium fusion test of organic compounds, the nitrogen of the organic compound is converted into$ (1) $sodamide$ (2) $sodium cyanide$ (3) $sodium nitrite$ (4) $sodium nitrate.$ 546. $The carboxyl functional group (- COOH) is present in$ (1) $picric acid$ (2) $barbituric acid$ (3) $ascorbic acid$ (4) $aspirin$ 547. $In the hydroboration-oxidation reaction of propene with diborane, H_{2} O_{2} and NaOH, the organic compound formed is :$ (1) $C H_{3} C H_{2} OH$ (2) $C H_{3} C H O H C H_{3}$ (3) $C H_{3} C H_{2} C H_{2} OH$ (4) $(C H_{3})_{3} COH$ 548. $Among the following acid which has the lowest p K_{a} value ?$ (1) $C H_{3} C H_{2} COOH$ (2) $(C H_{3})_{2} CH-COOH$ (3) $HCOOH$ (4) $C H_{3} COOH$ 549. $The major product formed when 1,1,1-trichloro-propane is treated with aqueous potassium hydroxide is:$ (1) $Propyne$ (2) $1-Propanol$ (3) $2-Propanol$ (4) $Propionic acid$ 550. $Pyridine is less basic than triethylamine because :$ (1) $Pyridine has aromatic character$ (2) $Nitrogen in pyridine is sp2 hybridised$ (3) $Pyridine is a cyclic system$ (4) $In pyridine, lone pair of nitrogen is delocalise$ 551. $Lassaigne’s test is used in qualitative analysis to detect$ (1) $nitrogen$ (2) $sulphur$ (3) $chlorine$ (4) $all of these$ 552. $In Dumas method, 0.3 g of an organic compound gave 45 mL of nitrogen at STP. The percentage of nitrogen is$ (1) $16.9$ (2) $18.7$ (3) $23.2$ (4) $29.6$ 553. $Cyclohexene _______is type of an organic compound.$ (1) $Benzenoid aromatic$ (2) $Benzenoid non-aromatic$ (3) $Acyclic$ (4) $Alicyclic$ 554. $Which of the following molecules represents the order of hybridisation s p^{2}, s p^{2}, s p, s p from left to right atoms?$ (1) $H C \equiv C — C \equiv C H$ (2) $C H_{2} = C H — C \equiv C H$ (3) $C H_{2} = C H — C H = C H_{2}$ (4) $C H_{3} — C H = C H — C H_{3}$ 555. $The IUPAC name of the compound shown below is$ (1) $2 - Bromo-6-chlorocyclohex-1-ene$ (2) $6-Bromo-2-chlorocyclohexene$ (3) $3-Bromo-1-chlorocyclohexene$ (4) $1-Bromo-3-chlorocyclohexene$ 556. $Arrange the following labelled hydrogens in decreasing order of acidity$ (1) $b > c > d > a$ (2) $b > a > c > d$ (3) $c > b > d > a$ (4) $c > b > a > d$ 557. $What is the product when acetylene reacts with hypochlorous acid ?$ (1) $C H_{3} COCl$ (2) $C l C H_{2} CHO$ (3) $C l_{2} CHCHO$ (4) $C l C H_{2} COOH.$ 558. $The heating of phenyl-methyl ethers with HI produces$ (1) $ethyl chlorides$ (2) $iodobenzene$ (3) $phenol$ (4) $benzene$ 559. $In which of the following compounds, the C-Cl bond ionisation shall give most stable carbonium ion ?$ (1) $(C H_{3})_{3} C - C l$ (2) (3) (4) $(C H_{3})_{2} C H - C l$ 560. $The IUPAC name of the following compound is:$ (1) $4-Hydroxyhept-6-en-1-yne$ (2) $Hept-1-en-6-yn-4-ol$ (3) $Hept-6-en-1-yn-4-ol$ (4) $4-Hydroxyhept-1-en-6-yne$ 561. $Which of the following represent the given mode of hybridisation s p^{2} - s p^{2} -sp-sp from left to right.$ (1) $H2C=CH-C\equivN$ (2) $HC\equivC-C\equivCH$ (3) $H_{2} C=C=C= C H_{2}$ (4) 562. $Identify the compound that exhibits tautomerism.$ (1) $2-Butene$ (2) $Lactic acid$ (3) $2-Pentanone$ (4) $Phenol$ 563. $The molecular formula of second homologue in the homologous series of mono carboxylic acids is$ (1) $C_{3} H_{6} O_{2}$ (2) $C_{2} H_{4} O_{2}$ (3) $CH_{2} O$ (4) $C_{2} H_{2} O_{2}$ 564. $The IUPAC name of (C H_{3})_{2} CH - C H_{2} - C H_{2} Br is$ (1) $l‐bromo‐3‐methylbutane$ (2) $2‐methyl‐3‐bromopropane$ (3) $1‐bromopentane$ (4) $2‐methyl - 4 ‐bromobutane.$ 565. $In the following structure, the double bonds are marked as I, II, III and IV Geometrical isomerism is not possible at site (s) :$ (1) $I$ (2) $III$ (3) $I and III$ (4) $I and IV$ 566. $Which of the following molecules represents the order of hybridization s p^{2}, s p^{2}, sp, sp from left to right atoms?$ (1) $HC \equiv C - C \equiv CH$ (2) $C H_{3} -CH = CH - C H_{3}$ (3) $C H_{2} = CH - CH = C H_{2}$ (4) $C H_{2} = CH - C \equiv CH$ 567. $A straight chain hydrocarbon has the molecular formula C_{8} H_{10} . The hybridization of the carbon atoms from one end ofthe chain to the other are respectively s p^{3}, s p^{2}, s p^{2}, s p^{3}, s p^{2}, s p^{2}, s p and s p . The structural formula of the hydrocarbon would be$ (1) $C H_{3} C \equiv C C H_{2} - C H = CHCH = C H_{2}$ (2) $C H_{3} C H_{2} - C H = CHCH = C H C \equiv C H$ (3) $CHCH = C H C H_{2} - C \equiv C C H = C H_{2}$ (4) $CHCH = C H C H_{2} - C H = C H C \equiv C H$ 568. $The increasing order of reactivity of the following compound towards reaction with alkyl halides directly is:$ (1) $(B) < (A) < (C) < (D)$ (2) $(A) < (B) < (C) < (D)$ (3) $(B) < (A) < (D) < (C)$ (4) $(A) < (C) < (D) < (B)$ 569. $The number of s p^{3} hybridised carbons in an acyclic neutral compound with molecular formula C_{4} H_{5} N is :$ 570. $The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is$