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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.
| 501. |
Reactions of `C_(6)H_(5)CH_(2)Br` with aqueous sodium hydroxide follows……..A. `S_(N^(1))` mechanismB. `S_(N^(2))` mechanismC. Any of the above two depending upon the temperature of reaction.D. Saytzeff rule. |
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Answer» Correct Answer - A Alkyl halide being a primary alkyl halide is expected to take part in `S_(N^(1))` reaction since `C_(6)H_(5)overset(o+)(CH_(2))` carbocation is resonance stabilised. |
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| 502. |
How many isomeres are possible for compounds having the molecular formubal `CH_(5)H_(11)Br`A. nineB. eightC. sixD. seven |
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Answer» Correct Answer - B 1. `underset("1-bromo pentane") (CH_(3)-CH_(2)-CH_(2))-CH_(2)-Br` 2. `underset(2-"bromo pentane")(CH_(3)-CH_(2)-CH_(2)- underset(Br) underset(|)(CH)-CH_(3))` 3. `underset(3-"bromo pentane")(CH_(3)-CH_(2)-CH_(2)- underset(Br) underset(|)(CH_(2))-CH_(3))` 4. `underset(1-"bromo 2-2dimethyl propane") underset(CH_(3)) underset(|) overset(CH_(3)) overset(|)(CH_(3)-C-CH_(2))-Br` 5. `underset(2-"bromo 3-methyl butane") (CH_(3)- overset(CH_(3)) overset(|)(CH)- underset(Br)underset(|)(CH-CH_(3)))` 6. `underset(1-"bromo 2-methyl butane") (CH_(3)CH-underset(C_(2)H_(5)) underset(|)(CH_(2))-Br)` 7. `underset(1-"bromo 2-methyl butane") (CH_(3)-overset(CH_(3)) overset(|) underset(Br) underset(|)C-C_(2)H_(5)` 8. `underset("1-bromo 3-methyl butane") (CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(2)-CH_(2)-Br)` |
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| 503. |
Of the possible structure of the molecular formula `C_(5)H_(11)Br` how many are opticllay active ?A. 1B. 4C. 5D. 3 |
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Answer» Correct Answer - D Optically active structures are 1 `CH_(3)-CH_(2)-CH_(2)- underset("2-bromo pentane") underset(H) underset(|) overset(Br) overset(|)C-CH_(2)` 2. ` underset(2-"bromom 3-methyl butane") underset(H) underset(|)(CH_(3)-overset(CH_(3)) overset(|)CH-overset(Br) overset(|)C-CH_(3))` `C_(2)CH_(5)- overset(CH_(3)) overset(|) underset(2-"metyl 11-romom butane") underset(H) underset(|)C-CH_(2)-Br` |
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| 504. |
Which of the carbon atoms present in the molecule given below are asymmetric ? A. 1,2,3,4B. 2,3C. 1,4D. 1,2,3 |
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Answer» Correct Answer - B Carbon has four valencies. If a carbon atom satisfies all of its four valencies with four different groups then it is termed as asymmetric/chiral carbon. In the given compound 2 and 3 carbon are bonded to four different groups, so these are asymmetric |
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| 505. |
An organic compound of structure `CH_(3)CH_(2)CH_(2)CH_(2)Cl` shows chain isomer of compound of structural formula,A. `(CH_(3))_(3)C Cl`B. `CH_(3)CH_(2)CHClCH_(3)`C. `(CH_(3))_(2)CHCH_(2)Cl`D. none of these |
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Answer» Correct Answer - C `(CH_(3))_(2)CHCH_(2)Cl` is a isobutly chloride shows isomereism with n-butyl chloride, because in those compounds arrangnements carbon chain is differenct but chlorine atom is at same position |
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| 506. |
Which of the following has asymmetric carbon atoms ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 507. |
Which of the following is correct statements ?A. Optical active isomers have same geometrical shapeB. Optical active isomers have different geometrical shapeC. Optical active isomers have same different chemical propertiesD. Optical active isomers have same configuration |
| Answer» Correct Answer - B | |
| 508. |
Only the chiral molecule show the phenomenon ofA. optical isomersB. chain isomersC. geometrical isomersD. functional isomerism |
| Answer» Correct Answer - A | |
| 509. |
Consider following reaction : Select correct statements (s) :A. Inversion in both cases takes placeB. Retention in both cases takes placeC. Retention in I and inversion in II take placeD. Racemisation in I and inversion in II take place |
| Answer» Correct Answer - D | |
| 510. |
Which of the following compounds is not chiral?A. 1-chloro-2-methyl pentaneB. 2-chloropentaneC. 1-chloropentaneD. 3-chloro 2-methyl pentane |
| Answer» Correct Answer - C | |
| 511. |
Consider the following organic compound To make it a chiral the attack should be on carbonA. 1B. 4C. 3D. 7 |
| Answer» Correct Answer - C | |
| 512. |
Which of the following compounds is not formed in iodoform reaction of acetone?A. `CH_(3)COCH_(2)I`B. `CH_(3)COCHI_(2)`C. `CH_(3)COCI_(3)`D. `ICH_(2)COCH_(2)I` |
| Answer» Correct Answer - D | |
| 513. |
Isopropyl chloride undergoes hydrolysis by :A. `SN^(-1)` reactionB. `SN^(2)` reactionC. both `SN^(1) and SN^(2)` reactionD. neither `SN^(1) and SN^(2)` reaction |
| Answer» Correct Answer - C | |
| 514. |
Find out reagent in following reaction A. `I_(2) and HI`B. `I_(2) and HgI_(2)`C. `I_(2) and HgO`D. `I_(2) and H_(2)SO_(4)` |
| Answer» Correct Answer - C | |
| 515. |
Which of the following is the correct method of preparation of methyl fluoride ?A. `CH_(3)Br+AgF to `B. `CH_(3)OH +HF to`C. `CH_(4)+F_(2) to`D. `CH_(4) +HF to` |
| Answer» Correct Answer - A | |
| 516. |
Methyl bromide reacts with AgF to give methyl fluoride and silver bromide. This reaction is calledA. Fitting reactionB. Swart reactionC. Wurtz reactionD. Finkelstein reaction |
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Answer» Correct Answer - B `CH_3Br+AgF to CH_3F+AgBr` This reaction is known as Swarts reactions. |
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| 517. |
2, 4, 6 -trinitrochorobenzene is warmed with water givesA. piciric acidB. 2, 4, 6-trinitrobenezoic acidC. phenolD. p-nitrophenol |
| Answer» Correct Answer - A | |
| 518. |
Which of the following statement is correct about halobenzene?A. lt are more reactive than haloalkaneB. C-X bond has always single bond characterC. C-X bond in haloarene is more polar than C-X bond in haloalkaneD. Never undergoes `SN^(1)` reaction |
| Answer» Correct Answer - D | |
| 519. |
Which of the following is more reactive in nucleophilic substitution reactionA. ` (##NIK_OBJ_CHE_XII_C10_E02_017_O01.png" width="30%">B. C. D. |
| Answer» Correct Answer - C | |
| 520. |
Which of the following has strongest C-Cl bond ?A. `C_(6)H_(5)-Cl`B. `CH_(3)-Cl`C. `(CH_(3))_(3)C-Cl`D. `(CH_(3))_(3)CH-Cl` |
| Answer» Correct Answer - A | |
| 521. |
Which of the following compound is more reactive in nucleophilic substitution reaction?A. o-bromotolueneB. 2, 4, 6-trinitro chlorobenzeneC. 2-nitro chlorobenzeneD. 4-nitro chlorobenzene |
| Answer» Correct Answer - B | |
| 522. |
Which of following species is less reactive than benzene in electrophilic substitution reactionA. anilineB. bromobenzeneC. nitrobenzeneD. phenol |
| Answer» Correct Answer - C | |
| 523. |
The most reactive compound in electrophilic substitution reaction isA. B. C. D. |
| Answer» Correct Answer - A | |
| 524. |
Decreasing order of reactivity of following compounds in electrophilic substitution reaction is A. `4gt3gt2gt1`B. `2gt3gt1gt4`C. `2gt1gt4gt3`D. `4gt3gt1gt2` |
| Answer» Correct Answer - B | |
| 525. |
Which of the following nitroso compound are in dynamic equilibrium with their tautomers ?A. B. C. D. |
| Answer» Correct Answer - -1.2 | |
| 526. |
Which compound in the following pairs will react faster in `S_N^(2)` reaction? (a). `CH_(3)Br` or `CH_(3)I` (b). `(CH_(3))_(3)C Cl` or `CH_(3)Cl` |
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Answer» (i). `C H_(3)I` because I is a bettery leaving group compared to Br. (ii). `CH_(3)Cl` because tertiary butyl group is more sterically hindered as compared to `CH_(3)` group. |
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| 527. |
Alkyl halide from the pair would react more rapidly by an `S_(N) 2` mechanism ? Explain your answer . `CH_(3)underset(CH_(3))underset(|)(C)HCH_(2)CH_(2) Br or CH_(3) CH_(2) underset(CH_(3))underset(|)(C)HCH_2 Br` |
| Answer» `CH_(3)underset(CH_(3))underset(|)(C)HCH_(2)CH_(2)Br` The presence of methyl group closer to the halide group will increases the steric hindrance and decrease the rate . | |
| 528. |
Which of the following compound can be resolved into enatiomers ?A. B. C. D. |
| Answer» Correct Answer - (2,3) | |
| 529. |
Write the IUPAC name of the compound `CH_(3)-C-=C-CHClCH_(3)`. |
| Answer» Correct Answer - 4-chloropent-2-yne. | |
| 530. |
Which will react faster in `S_(N^(2))` displacement reaction, 1-Bromopentane or 2-Bromopentane and why? |
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Answer» The order of reactivity of alkyl halides towards `S_(N^(2))` displacement reactions is: primarygtsecondarygttertiary. Therefore 1-Bromopentane will react faster. |
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| 531. |
Which will react faster in `S_(N^(1))` displacement reaction? 1-Bromopentane or 2-Bromopentane. |
| Answer» Correct Answer - 1-Bromopentane. | |
| 532. |
Which compound in the following couples will react faster in `S_(N^(2))` displacement reaction and why? (i). 1-Bromopentane or 2-Bromopentane (ii). 1-Bromo-2-methylbutane or 2-bromo-2-methyl butane. |
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Answer» (a). 1-bromopentane (b). 1-Bromo2-2methylbutane. |
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| 533. |
Which of the following will give acetophenone as a product ?A. B. C. D. All of the above |
| Answer» Correct Answer - D | |
| 534. |
When `C CI_(4)` is boiled with hot ethanolic KOH. The product formed is KCI and:A. formic acidB. methyl alcoholC. formaldehydeD. potassium carbonate |
| Answer» Correct Answer - D | |
| 535. |
Ethyl bromide and ethanolic KOH mainly producesA. etheneB. ethanolC. diethyl etherD. ethane |
| Answer» Correct Answer - A | |
| 536. |
In which of the following reactions an otically active single product is formed ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 537. |
Which metal is used in Wurtz synthesis?A. BaB. AlC. NaD. Fe |
| Answer» Correct Answer - C | |
| 538. |
Which of the following is known as freon which is used as refrigerant ?A. `C Cl_(2)F_(2)`B. `CHCl_(3)`C. `CH_(2)F_(2)`D. `CF_(4)` |
| Answer» Correct Answer - A | |
| 539. |
Which of the following is known as freon which is used as a refrigerant ? .A. `COCI_(2)`B. `C CI_(4)`C. `CF_(4)D. `CF_(2) CI_(2)` |
| Answer» Correct Answer - 4 | |
| 540. |
Which of the following is known as freon which is used as a refrigerant ? .A. `CI-overset(F)overset(|)underset(CI)underset(|)C-overset(F)overset(|)underset(CI)underset(|)C-H`B. `F-overset(CI)overset(|)underset(CI)underset(|)C-overset(CI)overset(|)underset(CI)underset(|)C-F`C. `F-overset(CI)overset(|)underset(F)underset(|)C-overset(F)overset(|)underset(F)underset(|)C-CI`D. `F-overset(F)overset(|)underset(CI)underset(|)C-overset(CI)overset(|)underset(H)underset(|)C-overset(F)overset(|)underset(F)underset(|)C-F` |
| Answer» Correct Answer - C | |
| 541. |
Which of the following will not give iodoform test ?A. EthanolB. Isopropyl alcoholC. EthanalD. Benzyl alcohol |
| Answer» Correct Answer - D | |
| 542. |
Which of the following substrate is most reactive towards methoxide ion `(Me- overset(Theta)(O))`?A. `CH_(3)- I`B. C. `CH_(3) -O - SO_(2) -CF_(3)`D. `CH_(3) -F` |
| Answer» Correct Answer - 3 | |
| 543. |
which one of the following is excellent substrate for `S_(N1)` reaction ?A. `(CH_(3))_(3) C-Cl`B. `(CH_(3))_(2) CH-Cl`C. `(CH_(3))_(2) N-CH_(2)Cl`D. `(CH_(3))_(3) C-Br` |
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Answer» Correct Answer - C Carbocation of the substrate (C) is stabilized by delocalisation. |
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| 544. |
In the following reaction The substrate is trasnsformed intoA. B. C. D. |
| Answer» Correct Answer - 2 | |
| 545. |
Alkyl halides are immiscible in water thought they are polar becauseA. they react with water to give alcoholsB. they cannot form hydrogen bonds with waterC. C-X bond cannot be broken easilyD. they are stable compounds and are not reactive. |
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Answer» Correct Answer - B Though polar, alkyl halides cannot form hydrogen bonds with water hence they are insoluble in water. |
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| 546. |
Cyanide ion acts as an ambident nucleophille. From which end it acts as a strong nucleophile in aqueous medium? Give reason for your answer.A. It act as a stronger nucleophile from carbon end.B. It acts as a stronger nucleophile from nitrogen end.C. It depends on the nature of the alkyl halide.D. It has same strength from both the ends. |
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Answer» Correct Answer - A It acts as a stronger nucleophile from the carbon end because it will lead to the formation of C-C bond which is more stable than C- N bond. |
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| 547. |
Which of the following is not an ambident nucleophile?A. `CH^(-)`B. `NO_(2)^(-)`C. `SCN^(-)`D. `OH^(-)` |
| Answer» Correct Answer - 4 | |
| 548. |
Wurtz reaction is used to prepareA. alkyl benzeneB. phenolC. alkaneD. diphenyl |
| Answer» Correct Answer - C | |
| 549. |
Arrange the following compounds in increasing order of their boiling points. `(ii) CH_3CH_2CH_2CH_2Br ` `H_3C-underset(Br)underset(|)overset(CH_3)overset(|)C-CH_3`A. (II)lt(I)lt(III)B. (I)lt(II)lt(III)C. (III)lt(I)lt(II)D. (III)lt(II)lt(I) |
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Answer» Correct Answer - C Boiling point increases as the branching decreases. |
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| 550. |
Arrange the following compounds in the increasing order in their densities. A. (I)lt(II)lt(III)lt(IV)B. (I)lt(III)lt(IV)lt(II)C. (IV)lt(III)lt(II)lt(I)D. (II)lt(IV)lt(III)lt(I) |
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Answer» Correct Answer - A Density increases as the molecular mass increases. |
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