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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.
| 301. |
Identify the product of the following reaction. `ClCH_2CH_2CH_2Br+KCNto`productA. `ClCH_2CH_2CH_2CN`B. `CNCH_2CH_2Br`C. `CNCH_2CH_2CH_2CN`D. `Clunderset(CN)underset(|)CHCH_2CH_2Br` |
| Answer» Correct Answer - A | |
| 302. |
In `S_(N^2)` reactions the sequence of bond breaking and bond formation is as followsA. bond breaking is followed by formationB. bond formation is followed by breakingC. bond breaking and formation occur simultaneously.D. bond breaking and formation take place randomly. |
| Answer» Correct Answer - C | |
| 303. |
`C_(2)H_(5)Br` can be obtained in the laboratory by the action of ethyl alcohol with :A. `KBr`B. `NH_(4)Br`C. `Br_(2)`D. `KBr " and conc "H_(2)SO_(4)` |
| Answer» Correct Answer - D | |
| 304. |
Which one is an organometallic compound ?A. `C_(2)H_(5)ONa`B. `C_(2)H_(5)SNa`C. `C_(2)H_(5)MgI`D. All of these |
| Answer» Correct Answer - C | |
| 305. |
Ethylene chloride and ethylidene chloride are isomers. Identify the correct statements.A. Both the compounds form same product on treatment with alcoholic KOH.B. Both the compounds form same product on treatment with aq. NaOH.C. Both the compounds form same product on reduction.D. Both the compounds are optically active. |
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Answer» Correct Answer - A::C (a,c) are both correct statements. |
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| 306. |
Write the structural formula of a compound fo molecular formula `C_(5)H_(8)Cl_(4)` in which there is one quaternary carbon and four methylene groups. |
| Answer» `ClH_(2)C-underset(CH_(3)Cl)underset(|)overset(CH_(3)C l)overset(|)(C)-CH_(2)Cl` | |
| 307. |
Arrange the following in order of their incresing ractivity towards nucleophilic substitution reaction: |
| Answer» `CH_(3)-F lt CH_(3) -Cl lt CH_(3) - Br lt CH_(3) -I` | |
| 308. |
On treating a mixture of two alkyl halides with sodium metal in dry ether, `2`-methylpropane was obtained. The alkyl halides areA. 1-chloropropane and chloroethaneB. 2-chloropropane and chloroethaneC. 2-chloropropane and chloromethaneD. 1-chloropropane and chloromethane |
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Answer» Correct Answer - C `CH_(3)-underset(Cl)underset(|)CH-CH_(3) + 2Na + CICH_(3) ("Dry ether")/("Wurtz reaction")` `CH_(3)-underset(CH_(3))underset(|)CH-CH_(3)+ 2NaCI` |
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| 309. |
Which of the following will give `1^(@), 2^(@), 3^(@)`, monobromo derivative ?A. `CH_(3)CH_(2)-CH_(2)-CH(CH_(3))CH_(3)`B. `CH_(3)CH_(2)CH_(2)-CH_(2)-CH_(3)`C. `CH_(3)CH_(2)-C(CH_(3))-CH_(3)`D. `CH_(3)-CH(CH_(3))CH(CH_(3))CH_(3)` |
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Answer» Correct Answer - A Compounds (a) has three types of hydrogen atoms i..e, `1^(@) H, 2^(@) H, 3^(@)` . On monobromination give three monobromo derivatives. |
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| 310. |
X and Y in the reaction areA. B. C. D. |
| Answer» Correct Answer - A | |
| 311. |
Which one of the following is most reactive towards nucleophilic substitution reaction ?A. `H_(2)C=CH-CI`B. `C_(6)H_(5)CI`C. `CH_(3)-CH=CH-CI`D. `CICH_(2)-CH=CH_(2)` |
| Answer» Correct Answer - D | |
| 312. |
Write the IUPAC name of `CH_(3)-underset(C_(2)H_(5))underset(|)(C)H-CH_(2)-Cl`. |
| Answer» 1-Chloro-2-methylbutane | |
| 313. |
Which will undergo `S_(N^(2))` reaction feates among the following halogen compounds ?A. `CH_(3)CH_(2)F`B. `CH_(3)CH_(2) Cl`C. `CH_(3)CH_(2)Br`D. `CH_(3)CH_(2)I` |
| Answer» Correct Answer - D | |
| 314. |
The trade name of trichloroethylene is :A. freonB. westronC. westrosolD. DDT |
| Answer» Correct Answer - C | |
| 315. |
Arrange the following compounds in the decreasing order of the boiling point: `underset(I)(CH_(3)Br) " "underset(II)(CH_(3)CH_(2)Br)" "underset(III)(CH_(3)CH_(2)CH_(2)Br)` `CH_(3)CH_(2)CH_(2)CH_(2)Br`A. `I gt II gt III gt IV`B. `IV gt III gt II gt I`C. `I gt III gt II gt IV `D. `III gt IV gt I gt II` |
| Answer» Correct Answer - B | |
| 316. |
Given the IUPAC name of `C_(2)H_(2)-underset(CH_(3))underset(|)overset(C(CH_(3))_(3))overset(|)C-CH_(2)-underset(CH_(3))underset(|)overset(Cl)overset(|)C-C_(2)H_(5)`A. 3-chloro -3,5-dimethyl-5-t-butylheptaneB. 3-chloro-5-ethyl-3, 5, 6, 6-tetramethyl heptaneC. 5-chloro-2, 2, 3, 5-tetramethyl-3-ethylheptaneD. 5-chloro-3, 5-dimethyl-3-t- butylheptane |
| Answer» Correct Answer - B | |
| 317. |
Isopropyl chloride undergoes hydrolysis by :A. `S_(N^(1))` mechanismB. `S_(N^(2))` mechanismC. `S_(N^(1)) " and " S_(N^(2))` mechanismD. Neither `S_(N^(1)) " nor " S_(N^(2))` mechanism |
| Answer» Correct Answer - C | |
| 318. |
`CH_(2)-X` is presentation ofA. `1^(@)R-X`B. `2^(@)R-X`C. `3^(@)R-X`D. `4^(@)R-X` |
| Answer» Correct Answer - A | |
| 319. |
How will you carry out the conversion Ethane to bromomethene |
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Answer» Conversion of Ethane to Bromo Ethane . `Cunderset("Ethane")(H_(3)- C)H_(3) + Br_(2) overset("Sunlight")(to) underset("Bromo Ethane")(CH_(3)- CH_(2) -) Br + HBr` |
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| 320. |
How many structural isomers are possible for the molecular formula `C_(5)H_(11) Br`? |
| Answer» Correct Answer - 8 | |
| 321. |
Predict the alkenes that would be formed in the reaction and identify the major alkene . 2-Chloro-2-methylbutane `overset(NaOEt)underset(EtOH)(to)` ? |
| Answer» `CH_(3) -overset(CH_(3))overset(|)underset(Cl) underset(|)(C)-CH_(2) - CH_(3) overset(C_(2)H_(5)ONa//C_(2)H_(5)OH)(to) underset("(major)")underset("2-methyl 2-Butene")(CH_(3)- overset(CH_(3))overset(|)(C)=CH- CH_(3)) + CH_(2) underset("(minor)")underset(2-"methyl 1-Butene")(=overset(CH_(3))overset(|)(C)-CH_(2) - CH_(3))` | |
| 322. |
Which is the correct IUPAC name for `CH_(3)-underset(C_(2)H_(5))underset(|)"CH"-CH_(2)-Br`?A. 1-Bromo-2-ethylpropaneB. 1-Bromo-2-ethyl-2-methylethaneC. 1-Bromo-2 methylbutaneD. 2-Methyl-1-bromobutane. |
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Answer» Correct Answer - C It is the correct IUPAC |
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| 323. |
Arrange the following compounds in increasing order of `S_(N^(1))` reactivity. (a). (I). `ClCH_(2)CH=CHCH_(2)CH_(3)`, (II). `CH_(3)C(Cl)=CHCH_(2)CH_(3)`, (III). `CH_(3)CH=CHCH_(2)CH_(2)Cl` (b). (I). `CH_(3)CH_(2)Br`, (II). `CH_(2)=CHCH(Br)CH_(3)`, (III). `CH_(2)=CHBr,` (IV). `CH_(3)CH(Br)CH_(3)` (c). (I). `(CH_(3))_(3)CBr`, (II). `(CH_(3))_(2)CHBr`, (III). `CH_(3)CH_(2)CH_(2)Br`, |
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Answer» The order of reactivyt of alkyl halies towards `S_(N^(1))` reactions is: Allylic gt Tertiary gt Secondary gt primary gt Vinylic Based on this, the increasing order of reactivity in different alkyl halides listed above is: (a) (II) `lt(III)lt(I)` (b). `(III)lt(I)lt(IV)lt(II)` (c). `(III) lt (II) lt (I)`. |
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| 324. |
The product of following reaction `C_(6)+Cl_(2)overset(FeCl_(3))to?` isA. `C_(6)H_(5)-Cl`B. `C_(6)H_(6)Cl_(6)`C. ortho `-C_(6)H_(4)Cl_(2)`D. para `-C_(6)H_(4)Cl_(2)` |
| Answer» Correct Answer - A | |
| 325. |
Benzene is reacted with chlorine in the presence of `FeCl_(3)` gives A, which is reacted with sodium in ether givesA. benzoic acidB. benzaldehydeC. diphenylD. toulene |
| Answer» Correct Answer - C | |
| 326. |
Write the structure of the organic halogen compound 2-Bromo-3-methylhexane |
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Answer» 2-Bromo-3-methyl hexane Structure : `underset(1)(C)H_(3)-overset(Br)overset(|)(C)underset(2)(H)- overset(CH_(3))overset(|)(C) underset(3)(H)-Cunderset(4)(H_(2)) - Cunderset(5)(H_(2)) - underset(6)(C)H_(3)` |
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| 327. |
Ulmann reaction is used for the preparation of :A. diphenylB. tolueneC. iodobenzeneD. naphthalene |
| Answer» Correct Answer - A | |
| 328. |
The chloro compound which is used as a fire extinguisher isA. `C Cl_(4)`B. `CHCl_(3)`C. `CH_(3)Cl`D. `COCl_(2)` |
| Answer» Correct Answer - A | |
| 329. |
The reaction of `C_(6) H_(5) CH=CHCH_(3)` with HBr produces :A. `C_(6)H_(5)CH_(2)CH_(2)CH_(2)Br`B. `C_(6)H_(5)CH_(2)-underset(Br)underset(|)(CHCH_(3))`C. `C_(6)H_(5)-underset(Br)underset(|)(CHCH_(2))CH_(3)`D. `p-Br -C_(6)H_(4)-CH=CHCH_(3)` |
| Answer» Correct Answer - C | |
| 330. |
Why is sulphuric acid not used during the reaction of alcohols with KI? |
| Answer» (i) `H_(2)SO_(4)` cannot be used along with KI in the conversion of an alcohol to an alkyl iodide as it converts KI to corresponding acid, HI which is then oxidised by it to `I_(2)`. | |
| 331. |
Write structures of different dihalogen derivatives of propane . |
| Answer» `ClCH_(2)CH_(2)Cl ii) ClCH_(2) CH Cl CH_(3) iii) Cl_(2) CH CH_(2) CH_(3) iv) CH_(3) C Cl_(2) CH_(3)` | |
| 332. |
Why is sulphuric acid not used during the reaction of alcohols with KI ? |
| Answer» `H_(2)SO_(4)` cannot be used along with KI in the conversion of an alcohol to an alkyl iodide as it converts KI to corresponding acid , HI which is then oxidised by it to `I_(2)` . | |
| 333. |
Which of the following compounds has the highest boiling point?A. `CH_3CH_2CH_2Cl`B. `CH_3CH_2CH_2CH_2Cl`C. `CH_3CH(CH_3)CH_2Cl`D. `(CH_3)_3C Cl` |
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Answer» Correct Answer - B For the same halogen, boiling point of alkyl halide decreases as the size of the alkyl group decreases. For isomeric alkyl halides, boiling point decreases as branching increases. So the decreasing order of boiling point is `CH_3CH_2CH_2CH_2Cl gt CH_3CH_2CH_2Cl gt CH_3CH(CH_3)CH_2Cl gt (CH_3)_3C Cl`. |
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| 334. |
Steroisomes have differentA. molecular formulaB. structural formulaC. configurationD. conformation |
| Answer» Correct Answer - C | |
| 335. |
In which of the following reaction an optically active product is formed?A. `CH_(3)-overset(H) overset(|) underset(H) underset(|)C-Cl-SN^(2)` Walden inversionB. `CH_(3)-overset(H) overset(|) underset(H) underset(|)C-Cl-SN^(1)` Walden inversionC. `C_(6)H_(5)-overset(C_(2)H_(5)) overset(|) underset(CH_(3)) underset(|)C-Cl-SN^(1)` retention of configurationD. `C_(6)H_(5)-overset(C_(2)H_(5)) overset(|) underset(CH_(3)) underset(|)C-Cl-SN^(2)` retention of configuration |
| Answer» Correct Answer - A | |
| 336. |
A racemic mixture consistsofA. equal amounts of enantiomersB. different amounts of enantiomersC. unknown amounts of enentiomersD. unknown amounts of unknown compounds. |
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Answer» Correct Answer - A Optical rotation of one enantiomer is exactly balanced by the optical rotation of the other enantiomer taken in exactly equal amounts. |
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| 337. |
Which of the following compound is optically activeA. `C_(2)H_(5)-OH`B. `(CH_(3))_(2)CHCH_(3)-Cl`C. `CH_(3)-CHClC_(2)H_(5)`D. `C Cl_(2)F_(2)` |
| Answer» Correct Answer - C | |
| 338. |
In which of the following reaction an optically active product is formed?A. `CH_(3)ONa++C_(2)CH_(5)Cl to `B. C. D. |
| Answer» Correct Answer - C | |
| 339. |
Choose the correct increasing order of density of the following compounds.A. `C_3H_7ClltC_3H_7iltCH_2Cl_2ltCCl_2`B. `C_3H_7IltC_3H_7ClltCH_2CL_2ltCCl_4`C. `C_3H_7iltC_3H_7ClltCCl_4ltCH_2Cl_2`D. `C Cl_34ltCH_2Cl_2ltC_3H_7iltC_3H_7Cl` |
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Answer» Correct Answer - A As density increases with increase in number of carbon atoms, halogen atoms and atomic mass of the halogen atoms, Hence correct increasing order is `C_3H_7Cl lt C_3 H_7 I lt CH_3Cl_2 lt C Cl_4` |
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| 340. |
Chlorobenzene is extremely less reactive towards nucleophilic substitution reaction. Give two reasons for the same. |
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Answer» (i). The `C-Cl` bond has partial double bond character on account of conjugation. (ii). The carbon atom in `C-Cl` bond is `sp^(2)` hybridised and is therefore, sufficiently electronegative in nature. Therefore, the bond cleavage is quite difficult. |
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| 341. |
The starting substance for the preparation of 2-iodoprpane by hydroodination isA. `CH_(3)CHOHCH_(3)`B. `CH_(3)-CH=CH_(2)`C. `C_(2)H_(5)CHO`D. `CH_(3)COOH_(3)` |
| Answer» Correct Answer - B | |
| 342. |
When ethyl alcohol is reacted with `PCl_(5)` givesA. `Cl_(3)CHO`B. `C Cl_(3)CHO`C. `CH_(3)CH_(2)Cl`D. `CH_(3)COCH_(3)` |
| Answer» Correct Answer - C | |
| 343. |
Match the compounds given in column I with the effects given in Column II |
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Answer» A`to`(3) B`to`(4) C`to`(1) D`to`(2) A. Chloramphenicol is a broadspectrum antibiotic. It is used in the treatment of typhoid fever. B. Thyroxine is a hormone secreated by thyroid gland. execessiv secretion of thyraxine in the body is known as hyperthyroidism. Most patient with hyper thyroidism have an enlarged thyroid gland i.e, goitre. C. Chloroquine prevents the development of malaria parasite plasmodium vivax in the blood D. IUPAC name of chloroform is trichloromethane with formula `CHCI_(3)`, It is a colourless volatile, sweet-smelling liquid. Its vapours depresses the central nervous system and used as an anaesthetic. |
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| 344. |
Match the items of Column I and Column II |
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Answer» A`to`(3) B`to`(5) C`to`(1) D`to`(2) E`to`(4) A. A mixture containing two enantiomers in equal proportions will have zero optical rotation, such a mixture is known as racemic mixture The process of conversion of enantiomer into a racemic mixture is known as racemisation. If an alkyl halide follows `S_(N)1` mechanism then racemisation takes place while if it follows `S_(N)2` mechanism than inversion takes places. B.Chlorobromocarbons are used in fire extinguishers C.In vicinal dihalides, halogen atoms are present on the adjacent carbon atom Bromination of alkenes will give vicinal dihalides. D. Alkylidene halides are named as gem-dihalides. In gem-dihalides halogen atoms are present on same carbon atom E.Elimination of HX from alkylhalide follows Saytzeff rule. This rule states that "in dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms". |
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| 345. |
Match the reactions given in Column I with the type of reactions given in Column II |
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Answer» A`to`(2) B`to`(4) C`to`(5) D`to`(1) E`to`(3) A. In this reaction, an electrophile `Cl^(+)` attacks on to the benzene ring and substitution takes place. B. In this reaction, addition of HBr takes place on to the doubly bonded carbons of propene in accordance with Markownikoffs rule and electrophilic addition takes place C. In this reaction, the reactant is secondary halide Here. halogen atom is substituted by hydroxy ion. As it is secondary halide so it follows `S_(N)1` mechanism. D. In this reaction, halogen atom is directiy bonded to aromatic ring. So, It is nucleophilic aromatic substitution as `""^(-)OH` group has substituted halogen of given compound E. It is an elimination reaction. It follows Saytzeff elimination rule. |
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| 346. |
Match the structures of compounds given in Column I with the classes of compounds given Column II |
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Answer» A`to`(2) B`to`(4) C`to`(1) D`to`(3) A. In alkyl halide, halogen atom is bonded to `sp^(3)` hybridised carbon atom, which may be further bonded to one, two or three alkyl group, i.e., `CH_(3)-CH(X)-CH_(3)` B. Allyl halides are the compounds in which the halogen atom is bonded to `sp^(3)` hybridised carbon atom next to carbon-carbon double bond. i.e, `CH_(2-)` =CH- `CH_(2)` - X C. Aryl halides are the compounds in which the halogen atom is bonded to `sp^(2)` hybridised carbon atom of an aromatic ring, i.e., `C_(6)H_(5)X` D. Vinyl halides are the compounds in which the halogen atom is bonded to an `sp^(2)` hybridised carbon atom of a carbon-carbon double bond, i.e., `CH_(2) = CH- X` |
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| 347. |
Match the structures given in Column I with the names in Column II |
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Answer» A`to`(1) B`to`(2) C`to`(3) D`to`(4) A. The IUPAC name of compound (A) is 4-bromopent-2-ene. B. The IUPAC name of compound (B) is 4-bromo-3-methyl pent-2-ene. C. The IUPAC name of compound (C) is 1-bromo-2-methyl but-2-ene. D. The IUPAC name of compound (D) is 1-bromo-2-methylpent-2-ene. |
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| 348. |
Two possible stereo-structures of `CH_(3)CHOHCOOH`, which are optically active are calledA. atropisomersB. enantiomersC. mesomersD. diastereomers. |
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Answer» Correct Answer - B These are known as enantiomers. |
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| 349. |
Which statements is wrong about enantioners?A. They rotate PPL to different directionB. Normally they posses same physical propertiesC. The shape of ther crystals are sameD. Their chemical properties are same. |
| Answer» Correct Answer - C | |
| 350. |
Which of the following has R configuration ?A. B. C. D. |
| Answer» Correct Answer - B | |