InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Isomers have essentially identicalA. Structural formulaB. Chemical propertiesC. Molecular formulaD. Physical properties |
| Answer» Correct Answer - C | |
| 552. |
Separating of d and l enantiomorphs from a racemic mixture is calledA. ResolutionB. DehydrationC. RotationD. Dehydrohalogenation |
| Answer» Correct Answer - A | |
| 553. |
Which one of the following is an optically active compoundA. n-propanolB. 2-chlorobutaneC. n-butanolD. 4-hydroxyheptane |
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Answer» Correct Answer - B `{:(" "H),(" |"),(CH_(3)-C^(**)-CH_(2)-CH_(3)),(" |"),(" "Cl),(" 2- Chlorobutane"):}` because it contain chiral carbon atom. |
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| 554. |
The IUPAC name of the given compound A. N,N-DimethylethylamineB. N-Ethyl-N-methyl methylamineC. 1-(dimethylamino) ethaneD. 1-(Ethylmethylamino) methane |
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Answer» Correct Answer - C |
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| 555. |
The name of the given structure A. 2,4-Dimethyl-3-3hexanoneB. 2,6-Dimethyl-5-heptanoneC. 2,6-Dimethyl 4-hexanoneD. 2,6-Dimethyl 4heptanone |
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Answer» Correct Answer - D |
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| 556. |
The IUPAC name of the compound `CH_(3)-CH(NH_(2))CH_(2)COOCH_(3)` isA. Methyl-2-amino butanoateB. Methyl-3- amino butanoateC. Methyl - 4 - amino butanoateD. 2 - amino pentanoate |
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Answer» Correct Answer - B |
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| 557. |
The IUPAC name of the given compound A. Octyl cyclopentaneB. 3- cyclopentyl octaneC. Cyclopentane octaneD. 6- cyclopentyl octane |
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Answer» Correct Answer - 2 |
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| 558. |
The IUPAC name of the given compound is : A. 3-Ethyl-1-cyclobuten-2-olB. 4-Ethyl-2-cyclobuten-1-olC. 2-Ethyl-3-cyclobuten-1-olD. 4-Ethyl-1-cyclobuten-3-ol |
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Answer» Correct Answer - B |
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| 559. |
IUPAC name of `CH_(3)-CHCl-CH_(2)-CHO` isA. 2-chloro-4-butanolB. 3-chlorobutanolC. 2-chloro-4-butanolD. 3-chlorobutanal |
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Answer» Correct Answer - D |
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| 560. |
The correct IUPAC name of `CH_(2)=CHOH` isA. ethenolB. ethanolC. ethenalD. ethanal |
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Answer» Correct Answer - A |
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| 561. |
The least number of carbon atoms required to exhibit chirality for an alkane is: |
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Answer» Correct Answer - 7 `C-C-underset(C)underset(|)underset(C)underset(|)underset(C)underset(|)overset(H)overset(|)C-C-C` |
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| 562. |
The IUPAC name of succinic acid isA. 1, 4-butanedioic acidB. Dimethyl -2-acidC. 1, 2-dimethyldioic acidD. None of these |
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Answer» Correct Answer - A `underset("1,4-butan-dioic acid")(overset(1)(C)OOH-overset(2)(C)H_(2)-overset(4)(C)OOH)` |
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| 563. |
The following compound can exhibits A. TautomerismB. Optical isomerismC. Geometrical isomerismD. Geometrical and optical isomerism |
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Answer» Correct Answer - B Optical isomerism because chiral centre is present `{:(" "H),(" |"),((CH_(3))_(2)-C=CH-C^(**)-COOH),(" |"),(" "CH_(3)):}` |
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| 564. |
The correct statement about the compounds A and B is A. A and B are identicalB. A and B are diastereomersC. A and B are enantiomersD. None of these |
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Answer» Correct Answer - C Both are enantiomer. |
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| 565. |
In the following graph, stability of different carbocations have been shows : Match the potential energy curve with carbocation.A. `{:(I,II,II),(A,B,C):}`B. `{:(I,II,II),(B,A,C):}`C. `{:(I,II,II),(C,B,A):}`D. `{:(I,II,II),(C,A,B):}` |
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Answer» Correct Answer - C ( c) The larger the stability, the smaller the `P.E` , hence `I gt II gt III`. |
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| 566. |
Number of optical isomers possible for |
| Answer» Correct Answer - Symetrical molecule | |
| 567. |
Which of the following is least stable ?A. `Me - O- overset (Ө) CH_2`B. C. `PhC overset (Ө) H_2`D. . |
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Answer» Correct Answer - A (a) In `(b),( c)` and `(d)`, carbanion is stabilished by resonance, but in `(a)` it is not stabilished. Moreove, `(+ I)` effect of `(Me)` group destabilises the carbanion in `(a)`. |
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| 568. |
Which of the following species is most stable ?A. `CH_2 = dot CH`B. `Ph dot C H_2`C. `Me_3 dot C`D. `Me_2 dot C H` |
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Answer» Correct Answer - B (b) Benzyl radical is more stable than `3^@` radical. |
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| 569. |
Which of following pairs are tautomers?A. B. `CH_(3)-CH_(2)-overset(O)overset(||)C-H,CH_(2)=CH-CH_(2)-OH`C. D. `CH_(3)-underset(O)underset(||)C-underset(O)underset(||)C-CH_(3),CH_(3)-underset(OH)underset(||)C-underset(OH)underset(||)C-CH_(3)` |
| Answer» Correct Answer - A | |
| 570. |
In which pairs first compound is stronger acid than the second ?A. Adipic acid, succinic acidB. Fumaric acid, maleic acidC. Pthalic acid, terepthalic acidD. Benzoic acid, Picric acid |
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Answer» Correct Answer - C Phthalic acid is stronger acid due to intramolecular hydrogen bonding. |
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| 571. |
The most acidic among the following compound is :A. `Cl-CH_(2)-CH_(2)-OH`B. C. D. |
| Answer» Correct Answer - C | |
| 572. |
Which of the following is/are correct statement/statements ?A. Guanidine `[NH_(2)-underset(NH)underset(||)C-NH_(2)]` is more basic than pyridine because conjugate acid of guanidine has three equal contributing resonating structure.B. Diethylamine is stronger base than triethylamine in aqueous mediumC. Ortho-methyl aniline is weaker base than para-methyl aniline.D. 2,4,6-Trinitro-N,N-dimethyl aniline is stronger base than 2,4,6-Trinitro aniline. |
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Answer» Correct Answer - A::B::C::D All statements are correct |
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| 573. |
Which form `(s)` of cyclohexane is/are free from angle strain?A. Chair formB. Boat formC. Twist boat formD. All of the above |
| Answer» Correct Answer - D | |
| 574. |
Which one of the following will not show geometrical isomerismA. B. C. D. |
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Answer» Correct Answer - B Structure have 3-different atoms and group so it is unable to show geometrical isomerism. |
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| 575. |
Keto and enol forms of a compound are related to each other asA. Resonance structuresB. ConformationsC. Configurational isomersD. Constitutional isomers |
| Answer» Correct Answer - D | |
| 576. |
Compare heat of hydrogenation (Decreasing order) |
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Answer» Correct Answer - (i)2>1, (ii)1<2, (iii) 1>2 (i). Heat of hydrogenation `prop(1)/("stability of alkene")` |
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| 577. |
Arrange the following in increasing order of heat of hydrogenation : A. `PgtQgtRgtS`B. `QgtPgtSgtR`C. `RgtSgtQgtT`D. `QgtSgtRgtP` |
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Answer» Correct Answer - C R is least stabilise alkene so, has maximum value. |
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| 578. |
Which of the following compounds shows tautomerismA. HCHOB. `CH_(3)CHO`C. `CH_(3)COCH_(3)`D. HCOOH |
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Answer» Correct Answer - C Ketones show tautomerism. They form keto and enol form `{:(" "O" "OH),(" ||"" |"),(CH_(3)-C-CH_(3)overset("Tautomerism")hArr CH_(3)-C=CH_(2)):}` |
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| 579. |
The keto isomer of the following compound is : A. B. C. D. |
| Answer» Correct Answer - C | |
| 580. |
Arrange the following in decreasing order of heat of hydrogenation : A. `PgtQgtRgtS`B. `SgtRgtQgtP`C. `QgtPgtSgtR`D. `RgtQgtPgtS` |
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Answer» Correct Answer - A S is most stabilise so, has minimum value. |
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| 581. |
Arrange the following in increasing order of their heat of hydrogenation : A. `PltQltRltS`B. `SltRltQltP`C. `SltRltPltQ`D. `SltRltPltQ` |
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Answer» Correct Answer - A As stability of alkene increase heat of hydrogenation decreases. |
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| 582. |
Arrange the following compounds in increasing order of their heat of conbustion : A. `PltQltRltSltT`B. `TltSltPltQltR`C. `QltPltRltTltS`D. `RltSltTltQltP` |
| Answer» Correct Answer - B | |
| 583. |
Most contributing structure in introethene is :A. B. C. D. |
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Answer» Correct Answer - A All atoms have complete octet structure. |
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| 584. |
Which of the following is not valid resonance structre of polyene?A. B. C. D. |
| Answer» Correct Answer - D | |
| 585. |
Glucose reacts with excess of phenylhydrazine and formsA. GlucosazoneB. Glucose phenyl hydrazineC. Glucose oximeD. sorbitol |
| Answer» Correct Answer - A | |
| 586. |
Which pair different for reaction with Fehling solution:A. glucose, fructoseB. HCHO, `CH_(3)CHO`C. `CH_(2)COCH_(3),C_(6)H_(5)CHO`D. glucose, sucrose |
| Answer» Correct Answer - D | |
| 587. |
The two function groups present in a typical carbohydrate areA. `-OH` and `-COOH`B. `-CHO` and `-COOH`C. `gt C=O` and `-OH`D. `-OH and -CHO` |
| Answer» Correct Answer - D | |
| 588. |
The monomer of cellulose isA. FructoseB. GalactoseC. GlucoseD. none of these |
| Answer» Correct Answer - C | |
| 589. |
Which of the following statements are incorrectA. EtOH is more acidic than water.B. Both `C-O` bonds in `Me-underset(O)underset(||)(C)-OH` are of equal length due to resonance.C. `Ph-NH_(2)` is more basic then `Me-NH_(2)`D. `-underset(..)overset(..)(O)-overset( :O: )overset(||)(C)-R` is a positive mesomeric effect `(+M)` showing group. |
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Answer» Correct Answer - A::B::C (i). Water is more acidic than Et-OH (ii). Bond length is not equal since R.S. are not equivalent (iii). `Ph-overset(..)(N)H_(2)` is weaker base than `Me-NH_(2)`, due to involvement of lone pair of electron in resonance. (iv). If key atom is lone pair bearing it will show `+M` effect |
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| 590. |
Among the given pairs in which pairs first compound has higher boiling point than second?A. `CH_(3)-overset(o+)CH-CH_(3) and CH_(3) -overset(o+)CH-OCH_(3)`B. `CH_(3)-CH_(2)-CH_(2)-CH_(3)and CH_(3)-CH_(2)-CH_(3)`C. `CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(3)and CH_(3)-overset(CH_(2)-CH_(3))overset(|)(C)-H-CH_(2)-OH`D. `CH_(3)-CH_(2)-CH_(2)-CH_(3)and CH_(3)-CH_(2)-CH_(2)-CI` |
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Answer» Correct Answer - B B.P `prop` surface area of molecule `prop` extent of inter molecular H-bonding `prop` dipole moment of molecules. |
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| 591. |
The pka value in `H_(2)O` of picric acid, acetic, acid and phenol are in the order :A. Picric acid 0.4, svryov svof 4.75, phenol 10.0B. Acetic acid 0.4, picric acid 4.75, phenol 10.0C. Picric acid 0.4, phenol 4.75, acetic acid 10.0D. Phenol 0.4, acetic acid 4.75 picric acid 10.0 |
| Answer» Correct Answer - A | |
| 592. |
The dipole moments of halo compounds are in the orderA. `CHCI_(3)gtC CI_(4)gtCHCI_(2)gtcis-CHCI=CHCI`B. `cis-CHCI=CHCIgtCHCI_(3)gtCH_(2)CIgtC CI_(4)`C. `cis-CHCI=CHCIgtCH_(2)CI_(2)gtCHCI_(3)gtC CI`D. `CHCI_(3)gtCHCI_(2)gtcis-CHCI=CHCIgtC CI_(4)` |
| Answer» Correct Answer - C | |
| 593. |
Which of the following is not resonating structure of each other ?A. `CH_(3)-N=C=Sand CH_(3)-S-C-=N`B. `CH_(3)-overset(+)C=O and CH_(3)-C-=overset(+)O-H`C. `CH_(3)-overset(O)overset(||)C-OH and CH_(3)-overset(O^(-))overset(|)C=overset(+)O-H`D. `CH_(2)=CH-C-=Nand overset(+)CH_(2)-CH=C=N^(-)` |
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Answer» Correct Answer - A In resonance we cannot change position of atom. |
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| 594. |
An organic compound has molecular formula `C_(9)H_(18)`. It is a saturated hydrocarbon and its all hydrogen atoms are identical. Its structural formula can be `:`A. B. C. D. |
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Answer» Correct Answer - B In compound (B) all the 18 hydrogen are identical |
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| 595. |
Arrange the following alcohols in the decreasing order of reactivity towards (a) Lucas reagent Sodium metal (1) 1-Butano1 (2) sodium metal (3) 2-Methy1-2-propanol. |
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Answer» (a) `3 gt 2 gt 1`[with Lucas reagent (anhydrous `ZnC1_2 + conc. HC1 (1 : 1), 3^@ gt 2 ^@ gt 1^@` alcohol]. (b) `1 gt 2 gt 3`(with sodium metal reactivity is `1^@ gt 2^@ gt 3^@` alcohol). |
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| 596. |
Among the following, the least stable resonance structure is :A. B. C. D. |
| Answer» Correct Answer - A | |
| 597. |
Select the correct statement-A. Proteins upon hydrolysis gives `alpha`-amino acid onlyB. Except glycine, all other naturally occuring `alpha`-amino acids are optically activeC. In fibrous proteins polypeptide chains are held together by hydrogen and disulphide bonds.D. Fats upon hydrolysis gives `alpha`-amino acids |
| Answer» Correct Answer - A::B::C | |
| 598. |
Select the incorrect statement-A. Monosaccharide are insoluble in organic solvents like diethyl ether.B. Anomers of a cyclic monosaccharides differ in the position of the OH group at the hemiacetal carbon.C. D-ribose the OH group used to form the five membered furanose ring is located on `C_(4)`D. Aldopentoses and ketohexoses form pyranose rings in solution |
| Answer» Correct Answer - A::B::C | |
| 599. |
Which is not correct about monosaccharidesA. Optically active polyhydroxy carbonyl compoundsB. Fructose & glucose can not be distinguish by `Br_(2)//H_(2)O`C. Glucose and mannose are anomersD. Fructose & glucose can be distinguish by Fehling solution. |
| Answer» Correct Answer - B::C::D | |
| 600. |
All sixteen possible aldohexose have been isolated or synthesised. Only three occur in nature there areA. D-GlucoseB. D-GalatoseC. D-MannoseD. L-Mannose |
| Answer» Correct Answer - A::B::C | |