InterviewSolution
Saved Bookmarks
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. |
The IUPAC name of acryldehyde isA. Prop-2-en-1-alB. PropenylaldehydeC. But-2-en-1-alD. Propenal. |
|
Answer» Correct Answer - A `underset("Prop-2-en-1-al")underset()(overset(3)CH_(2)=overset(2)CH-overset(1)CHO" "("Acrylodehyde"))` |
|
| 552. |
The IUPAC name of `CH_(3)-underset(Cl)underset(|)C=underset(CH_(3))underset(|)C-underset(C_(2)H_(5))underset(|)CH-CH_(2)-CequivCH`A. 6-Chloro-4-ethyl-5-methyl hept-5-en-1-yneB. 6-Chloro-4-ethyl-5-methyl hept-1-yn-5-eneC. 2-Chloro-4-ethyl-3-methyl hept-2-en-6-yneD. 2-Chloro-4-ethyl-3-methyl hept-6-yn-2-ene. |
|
Answer» Correct Answer - A `underset("6-Chloro-4-ethyl-5-methylhept-1-yn-5-ene")underset()(overset(7)CH_(3)-overset(6)underset(Cl)underset(|)C=overset(5)underset(CH_(3))underset(|)C-overset(4)underset(C_(2)H_(5))underset(|)(CH)-overset(3)CH_(2)-overset(2)(C^(@))overset(1)CH_(3))` |
|
| 553. |
Number of chiral carbon present in the following compound: `CH_(3)-underset(OH)underset(|)CH-CH_(2)-underset(Br)underset(|)CH-underset(C_(2)H_(5))underset(|)CH-CH_(3)`A. `2`B. `3`C. `4`D. `5` |
|
Answer» Correct Answer - B `CH_(3)-overset(**)underset(OH)underset(|)(CH)-CH_(2)-overset(**)underset(Br)underset(|)(CH)-overset(**)underset(C_(2)H_(5))underset(|)(CH)-CH_(3)` has `3` chiral atoms. |
|
| 554. |
What is the IUPAC name of `H-overset(overset(O)("||"))(C)-CH_(2)-CH_(2)-OCH_(3)`A. 2-FormylmethoxyethaneB. MethoxypropanalC. 2-Methoxypropanal.D. 3-Methoxypropanal. |
|
Answer» Correct Answer - D `underset("3-Methoxypropanal")underset()(H-overset(O)overset(||1)C-overset(2)CH_(2))-overset(3)CH_(2)-OCH_(3)` |
|
| 555. |
Which type of isomerism is observed between `I` and `II`? `underset((I))(CH_(3)-CH_(2)-underset(O)underset(||)C-OCH_(3))`, `underset((II))(CH_(3)-underset(O)underset(||)C-OC_(2)H_(5))`A. Functional isomerismB. MetamarismC. Position isomerismD. Stereoisomerism |
|
Answer» Correct Answer - B Ester`-underset(O)underset(||)(C)-O-` has different alkyl groups in `I` and `II` compound. |
|
| 556. |
The correct IUPAC name of `CH_(3)-CH_(2)-underset(O)underset(||)C-OCH_(3)` isA. Methoxy propanoneB. Methoxy propanalC. Methyl propanoateD. Methoxy ethyl ketone |
|
Answer» Correct Answer - C `underset("Methyl propanoate")underset()(overset(3)CH_(3)-overset(2)CH_(2)-overset(O)overset(1||)C-O-CH_(3))` |
|
| 557. |
The IUPAC name of `CH_(3)-underset(C_(2)H_(5))underset(|)C=CHCH_(3)` isA. 2-EthylbuteneB. 2-Ethylbut-2-eneC. 3-Methylpent-2-eneD. 3-Methylpent-3-ene |
|
Answer» Correct Answer - C `underset("3-Methylpent-2-ene")underset()(CH_(3)-overset(3)underset(CH_(2)-overset(5)CH_(3))underset(|4)C=overset(2)CH-overset(1)CH_(3))` |
|
| 558. |
What is the IUPAC name of `H- overset(O)overset(||)(C)-CH_(2)-CH_(2)-OCH_(3)`?A. 2-FormylmethoxyethaneB. MethoxypropanalC. 2-MethoxypropanalD. 3-Methoxypropanal |
| Answer» Correct Answer - D | |
| 559. |
The IUPAC name of `(CH_(3))_(2)CH-CH_(2)-CH_(2)Br` isA. 1-BromopentaneB. 2-Methyl-4-bromopentaneC. 1-Bromo-3-methylbutaneD. 2-Methyl-3-bromopropane. |
|
Answer» Correct Answer - C `underset("4-Bromo-3-Methylbutane")underset()(overset(4)CH_(3)-overset(CH_(3))overset(3|)(CH)-overset(2)CH_(2)-overset(1)CH_(2)Br)` |
|
| 560. |
One among the following is the correct IUPAC name for the compound `CH_(3)CH_(2)-overset(H)overset(|)N-overset(H)overset(|)C=O`A. N-FormylaminoethaneB. N-EthylformylamineC. N-EthylmethanamideD. Ethylaminomethanal |
|
Answer» Correct Answer - C Factual question. |
|
| 561. |
The IUPAC name of `(CH_(3))_(2)CHCH_(3)` isA. DimethylethaneB. TrimethylmethaneC. IsopropylmethaneD. 2-Methylpropane. |
|
Answer» Correct Answer - D `underset("2-Methylpropane")underset()(overset(3)CH_(3)-overset(CH_(3))overset(2|)(CH)-overset(1)CH_(3))` |
|
| 562. |
The number of `4^(@)` carbon atoms in 2, 2, 4, 4-tetramethylpentane :A. 1B. 2C. 3D. 4 |
|
Answer» Correct Answer - B `underset("carbons")underset()(overset(1)C-overset(C)overset(|)underset(C)underset(|)(C^(2)))-overset(3)C-overset(C)overset(|)underset(C)underset(|)(C^(4))-overset(5)C"C"_(2)" and "C_(4)" are " 4^(@)` |
|
| 563. |
The IUPAC name of `(CH_(3))_(2)CHCH_(2)CH_(2)Cl` isA. 1-ChloropentaneB. 1-Chloro-2-methylbutaneC. 2-Methyl-3-chloropropaneD. None |
|
Answer» Correct Answer - B Same as Q. 3. |
|
| 564. |
Which among the following is the correct IUPAC name of isoamylene ?A. 1-PenteneB. 2-Methylbut-2-eneC. 3-Methylbut-1-eneD. 2-Methylbut-1-ene. |
|
Answer» Correct Answer - C `underset("Methylbut-1-ene(Isoamylene)")underset()(overset(4)CH_(3)-overset(CH_(3))overset(|3)C-overset(2)CH=overset(1)CH_(2))` |
|
| 565. |
The IUPAC name of isA. 3-Ethyl-4, 4-dimethylheptaneB. 1, 1-Diethyl-2, 2-dimethylpentaneC. 4, 4-Dimethy-5, 5-dimethylpentaneD. 5, 5-Diethyl-4, 4-Dimethylpentane |
|
Answer» Correct Answer - A `{:(" "CH_(3)),(" |"),(overset(7)(C)H_(3)-overset(6)(C)H_(2)-overset(5)(C)H_(2)overset(4)(-C)-overset(3)(C)H-overset(2)(C)H_(2)-overset(1)(C)H_(3)),(" |"" |"),(" "CH_(3)""CH_(2)-CH_(3)):}` |
|
| 566. |
The IUPAC name of is :A. 2, 3-Dimethylbutanoyl chlorideB. 3, 4-Dimethylpentanoyl chlorideC. 1-Chloro-1-oxo-2, 3-dimethylpentaneD. 2-Ethyl-3-methylbutanoyl chloride. |
|
Answer» Correct Answer - A 2, 3-Dimethylbutanonyl chloride is the correct answer. |
|
| 567. |
Neo-heptyl alcohol is correctly represented asA. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-underset(OH)underset(|)CHCH_(2)CH_(3)`B. `CH_(3)-overset(CH_(3))overset(|)underset(OH)underset(|)C-CH_(2)CH_(2)CH_(2)CH_(3)`C. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(2)CH_(2)CH_(2)OH`D. `C_(2)H_(5)-overset(C_(2)H_(5))overset(|)underset(C_(2)H_(5))underset(|)C-OH` |
|
Answer» Correct Answer - C `underset("Neoheptyl alcohol")underset()(CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(2))-CH_(2)-CH_(2)OH` |
|
| 568. |
The common and `IUPAC` name for the group, `(CH_(3))_(2)CHCH_(2)-` respectively areA. Isobutyl, 2-methylpropylB. Isobutyl, 1-methylpropylC. tert-Butyl, 1, 1-dimethylethylD. sec-Butyl, 2-methylpropyl. |
|
Answer» Correct Answer - A `overset(3)CH_(3)-overset(CH_(3))overset(2|)(CH)-overset(1)CH_(2)-` Common name is isobutyl and IUPAC name is 2-methylpropyl. |
|
| 569. |
The correct IUPAC name of `CH_(3)CH_(2)CH(CH_(3))CH(C_(2)H_(5))_(2)` isA. 4-Ethyl-3-methylhexaneB. 3-Ethyl-4-methylhexaneC. 3-Methyl-4-ethylhexaneD. 2-Isopentylbutane. |
|
Answer» Correct Answer - B `underset("3-Ethyl-4-methylhexane")underset()(overset(6)CH_(3)-overset(5)CH_(2)-overset(CH_(3))overset(4|)(CH)-overset(CH_(2)-CH_(3))overset(3|)(CH)-overset(2)CH_(2)-overset(1)CH_(3))` |
|
| 570. |
The common name of `(CH_(3))_(3)C"C"_(2)H_(5)` isA. IsohexaneB. NeohexaneC. TrimethylpropaneD. none is correct |
|
Answer» Correct Answer - B `underset("Neohexane")underset()(CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(2))-CH_(3)` |
|
| 571. |
The correct IUPAC name of acetonitrile isA. CyanomethaneB. 2-KetopropanenitrileC. MethanenitrileD. Ethanenitrile. |
|
Answer» Correct Answer - D `underset("Ethanenitrile (Acetonitrile)")(CH_(3)-CequivN)` |
|
| 572. |
The family to which methoxyethene belongs isA. hydrocarbonB. ketoneC. unsaturated etherD. ester. |
|
Answer» Correct Answer - C `underset("Methoxyethene (An unsaturated ether)")underset()(CH_(3)-O-CH=CH_(2))` |
|
| 573. |
Which of the following molecular belongs to alkyne series?A. `C_(7)H_(18)`B. `C_(10)H_(22)`C. `C_(9)H_(16)`D. `C_(16)H_(32)` |
| Answer» Correct Answer - C | |
| 574. |
Alicyclic compounds areA. Aromatic compoundsB. Aliphatic cyclic compoundsC. Heterocyclic compoundsD. None of these |
| Answer» Correct Answer - B | |
| 575. |
Assertion: Rotation about C=C is restricted. Reason: Electron charge cloud of the `pi` bond is located aboe na dbelow the planne of bonding atoms.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - B In a `pi` bond formation, parallel orientation of the two p orbitals on adjacent atoms is necessary for proper sideways overlap. The p orbitals are mutually parallel and both the p orbitals are perpendicular to the plane of the molecule. Rotation of one `CH_(2)` fragment with respect to other, interferes with maximum overlap of p orbitals and hence such rotation is restricted. |
|
| 576. |
Why is acid added to sodium extract before adding silver nitrate for testing halogens ? |
|
Answer» Problem can arise in case the organic compound which also contains nitrogen and sulphur in addition to halogens. Both will form `NaCN` and `Na_(2)S` on fusion with sodium metal and will react with silver nitrate solution to give precipitates. `NaCN+AgNO_(3) rarr underset("White ppt.")(AgCN)+NaNO_(3)` `Na_(2)S+2AgNO_(3) rarr underset("Black ppt.")(Ag_(2)S)+2NaNO_(3)` These precipitates will interfere with the precipitate of silver of silver halide formed due to halogens. Nitric acid is added to destroy both these compounds to form volatile gases. `NaCN+HNO_(3) rarr NaNO_(3)+HCN uarr` `Na_(2)S+2HNO_(3) rarr 2NaNO_(3)+H_(2)S uarr` |
|
| 577. |
Why is an organic compound fused with sodium for testing nitrogen, halogens and sulphur ? |
| Answer» On fusing with sodium, these elements present in the compound are converted into their sodium salts `(NaCN, NaX" and "Na_(2)S)` which are water soluble. From the solution, theses elements can be detected by suitable tests. | |
| 578. |
The bond that undergoes heterolytic cleavage most readily isA. `C-C`B. `C-O`C. `C-H`D. `O-H` |
|
Answer» Correct Answer - D The greater the difference in electronegativities of the bonded atoms, more is the tendency of heterolytic cleavage of the bond. |
|
| 579. |
Assertion: Heterolytic fission occurs readily in polar covalent bonds. Reason: Hyterolytic fission involves breaking of bond in such a way that the shared pair of electrons go with one atom.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - B In polar covalent bond, shapred pair of electrons is displaced towards the more electronegative atom and hence in heterolytic fission, the electron pair is easily taken away by more electronegative atom. |
|
| 580. |
Assertion : Heterolytic fission occurs readily in polar covalent bonds. Reason : Heterolytic fission involves the breaking of bonf in such a way that the shared pair of electrons goes with one atom.A. If both assertion and reason are correct and reason is correct explanation for assertion.B. If both assertion and reason are correct but reason is not correct explanation for assertion.C. If assertion is correct but reason is incorrect.D. If both assertion and reason are incorrect. |
|
Answer» Correct Answer - B Correct explanation : Heterolytic fission involves the breaking of bond is such a way that the shared pair of electrons goes with the more electronegative atom. |
|
| 581. |
Chemically similar compounds having the same functional group but differing by a `CH_(2)` group in their molecular formula are known asA. IsomersB. HomologousC. AllotropesD. Polymers |
|
Answer» Correct Answer - B Such similar compounds differing by `CH_(2)` in their molecular masses are called homologues. |
|
| 582. |
Compounds having the same molecular formula but different structures are classified as structural isomers. Structural isomerism include chain, position, functional, group isomerism and metamerism. answer the following questions on the basis of above paragraph : (i) What is functional isomerism ? (ii) `CH_(3)OC_(3)H_(7)` and `C_(2)H_(5)OC_(2)H_(5)` represent which type of isomers ? |
|
Answer» (i) In this type of isomerism, the isomers having the same molecular formula have different functional groups and also belong to different families. (ii) these are regarded as metamers since they differ in the nature of the alkyl groups the same functional group. |
|
| 583. |
The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature isA. `-CONH_(2),-CHO,-SO_(3)H,-COOH`B. `-COOH,-SO_(3)H,-CONH_(2),-CHO`C. `-SO_(3)H,-COOH,-CONH_(2),-CHO`D. `-CHO,-COOH,-SO_(3)H,-CONH_(2).` |
|
Answer» Correct Answer - A `-COOH,-SO_(3)H,-CONH_(2),-CHO` |
|
| 584. |
Which of the following will have the least hindered rotation about carbon-carbon bonds?A. EthaneB. EthyleneC. AcetyleneD. Hexachloroethane |
|
Answer» Correct Answer - A Ethane `(CH_(3)-CH_(3))` has the least hindered rotation about `(C-C)` bond. |
|
| 585. |
Nucleophile is a species that should haveA. a pair of electrons to donateB. positive chargeC. negative chargeD. electron deficient species |
|
Answer» Correct Answer - A::B Nucleophiles should have either a pair of electrons to donate or should have a negative charge, i.e., options (a) and (c) are correct. |
|
| 586. |
Hyperconjugation involves delocalisation of............... .A. electrons of carbons-hydrogen `sigma` bond of an alkyl group directly attached to an atom of unsaturated systemB. electrons of carbon-hydrogen `sigma` bond of alkyl group directly attached to the positively charged carbon atomC. `pi`-electrons of carbon-carbon bondD. lone pair of electrons |
|
Answer» Correct Answer - A::B Options (a) and (b) are correct. |
|
| 587. |
The distillation techniquie most suited for separating glycerol from spent-lye in the soap industry isA. simple distillationB. fractional distillationC. steam distillationD. distillation under reduced pressure. |
| Answer» Correct Answer - D | |
| 588. |
The distillation technique most suited for separating glycerol from spent-lye in the soap industry isA. simple distillationB. fractional distillationC. steam distillationD. distillation under reduced pressure |
|
Answer» Correct Answer - D Glycerol decomposes at its b.p., therefore, it is separated from spent lye by distillation under reduced pressure. |
|
| 589. |
Why is impure glycerol by distillation under reduced pressure ? |
| Answer» The boiling point of glycerol is 563 K under normal pressure but it decomposes upon heating below this temperature. Thus, simple distillation cannot be used in this case. Under a reduced pressure of 12 mm Hg, glycerol can be distilled at 453 K without getting decomposed. | |
| 590. |
(a) Write IUPAC names of the following compounds : (i) `CH_(3)-underset(CH_(3))underset(|)(CH)-COOH` (ii) `CH_(3)-C equiv C-C equiv C-CH_(3)` (b) Define inductive effect. |
| Answer» (a) (i) 2-Methylpropanoic acid (ii) Hex-2, 4-diyne. | |
| 591. |
Identify correct order of reactivity in electronphilic substitution reactions of the following compounds A. `1gt2gt3gt4`B. `4gt3gt2gt1`C. `2gt1gt3gt4`D. `2gt3gt1gt4` |
|
Answer» Correct Answer - C We know, during electrophilic substitution of arenes electron donating groups activates the ring · (and are o, p-directing) and electron withdrawing groups deactivates the ring (and are m-directing). Halogens are o, p-directing but are not much activating. Therefore, correct order is `2gt3gt1gt4` |
|
| 592. |
Which of the following correctly represent the acidic strenth of given acids?A. `Cl_(3)CHgtF_(3)CH`B. `CH_(3)COOHgtCH_(3)CH_(2)OH`C. `H_(2)OgtCH_(3)CH_(2)OH`D. |
| Answer» Correct Answer - A::B::C::D | |
| 593. |
Which of the following is most acidic?A. B. C. `CH_(3)-O-H`D. |
| Answer» Correct Answer - B | |
| 594. |
What can be said with certainity if a compound has `[alpha]_(D1)^(25^(@)C)=-9.25^(@)C`?A. The compound is not a meso-isomerB. The compound has `R`-configurationC. The compound has at least one chiral centreD. The optical purity of compound is less than `100%` |
|
Answer» Correct Answer - A A meso compound is optically inactive with zero specific rotation. |
|
| 595. |
Assertion : All the carbon atoms of but-2-ene lie in one plane. Reason : All the carbon atoms in but-2-ene are `sp^(2)`-hybridized.A. If both assertion and Reason are true, and reason is the true explanation of the assertion.B. If both assertion and reason are true, but reason is not the true explanation of the assertion.C. If assertion is true, but reason is falseD. If both assertion and reason are false |
|
Answer» Correct Answer - C Correct reason : Only the carbon atoms of the double bond in but-2-ene are `sp^(2)` hybridized. |
|
| 596. |
Assertion : In `CH_(2)=C=CH_(2)`, all the carbon atoms are `sp^(2)`-hybridized. Reason : All the hydrogen atoms lie in one plane.A. If both assertion and Reason are true, and reason is the true explanation of the assertion.B. If both assertion and reason are true, but reason is not the true explanation of the assertion.C. If assertion is true, but reason is falseD. If both assertion and reason are false |
|
Answer» Correct Answer - D Correct assertion. In `CH_(2)=C=CH_(2)`, central carbon atom is sp-hybridized while the terminal ones are `sp^(2)`-hybridized. Correct reason. The two H-atoms on the first and third carbon atoms lie in perpendicular planes. |
|
| 597. |
The general formula `C_(n)H_(2n)O_(2)` could be for open chainA. dialdehydeB. diketonesC. carboxylic acidsD. diols |
| Answer» Correct Answer - C | |
| 598. |
The stability of carbanions in the following (i) `RC-=overset(-)overset(..)C` , (ii) (iii) `R_(2)C=overset(-)overset(..)CH` , (iv) `R_(3)C-overset(-)overset(..)CH_(2)` is in the orderA. `(iv)gt(ii)gt(iii)gt(i)`B. `(i)gt(iii)gt(ii)gt(iv)`C. `(i)gt(ii)gt(iii)gt(iv)`D. `(ii)gt(iii)gt(iv)gt(i).` |
|
Answer» Correct Answer - C The stability of carbanion decreases as the electronegativity of carbon carrying the -ve charge decreases or the hybridization of the carbon carrying the -ve charge changes from `sp-sp^(2)-sp^(3)`. Hence `RCequivC^(-)` (l) is the most stable while `R_(3)C-CH_(2)^(-)` (IV) is the least stable carbon anion. The carbon atom carrying the -ve charge in both `C_(6)H_(5)^(-)" and "RC = overset(-)CH` is `sp^(2)` hybridized. Out of these two `RC= CH^(-)` (iii) is less stable than `C_(6)H_(5)^(-)` (II) due to two R groups. `therefore` over all stability decreases in the order `(i)gt(ii)gt(iii)gt(iv)` |
|
| 599. |
Given below is the developed chromatogram of a mixture of pigments. `R_(y)` values for x and y can be expressed asA. `(x)/(z),(y)/(z)`B. `(x)/(y),(y)/(z)`C. `xz,yz`D. `(z)/(x),(z)/(y)` |
|
Answer» Correct Answer - A `R_(f)+("Distance travelled by substnace from base line (x)")/("Distance travelled by solvent from base line (z)")` For x:`R_(f)=(x)/(z),` for `y:R_(f)=(y)/(z)` |
|
| 600. |
Heterolytic cleavage of a covalent bond gives only,A. Cationic speciesB. Anionic speciesC. Both the aboveD. Free radicals. |
|
Answer» Correct Answer - C Heterolytic cleavage of a covalent bond gives cationic and anionic species. |
|