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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. |
After completion of esterification, excess of alcohol is removed by usingA. `CaCl_(2)`B. `CaOCl_(2)`C. `Na_(2)CO_(3)`D. `NaOH` |
| Answer» Correct Answer - A | |
| 502. |
For the following reaction `R - CN overset(H_(3)O^(+)) to R-COOH`A. there is protonation of electronegative nitrogenB. an amide is formed as an intermediateC. nitrogen atom is expelled as ammoniaD. all are correct |
| Answer» Correct Answer - D | |
| 503. |
Which one of the following correctly represents esterification reactionA. B. C. D. |
| Answer» Correct Answer - A | |
| 504. |
An aldehyde on oxidation givesA. an alcoholB. an acidC. A ketoneD. An ether |
| Answer» Correct Answer - B | |
| 505. |
Which of the following is an example of aldol condensation ?A. `2CH_(3) overset(OH^(-)) to CH_(3)CH(OH) CH_(2)CHO`B. `C_(6)H_(5) CHO overset(OH^(-)) to C_(6)H_(5)CH_(2)OH`C. `HCHO overset(OH^(-)) to HCH_(2) OH`D. `C_(6)H_(5)CHO+HCHO overset(OH^(-))to C_(6)H_(5)CH_(2)OH` |
| Answer» Correct Answer - A | |
| 506. |
The compound which reacts with Fehling solution isA. `C_(6)H_(5)COOH`B. `HCOOH`C. `C_(6)H_(5)CHO`D. `CH_(2)ClCH_(3)` |
| Answer» Correct Answer - B | |
| 507. |
Which of one the esters is formed by esterification of propan -2- ol with acetic acid ?A. `(CH_(3))_(2)CHCOOCH_(3)`B. `CH_(3)COOCH(CH_(3))_(2)`C. `CH_(3)CH_(2)CH_(2)COOCH_(3)`D. `(CH_(3))_(2)CHCOOCH_(2)CH_(3)` |
| Answer» Correct Answer - B | |
| 508. |
Which reaction does not have the correct oxidising agent ?A. `CH_(3) - CO CH_(3) overset(PC C) to CH_(3) COOH`B. `CH_(3) - CHO overset(Ag(NH_(3))^(+)) to CH_(3) COOH`C. `CH_(3) - CHO overset(Cr_(2)O_(7)^(2-)//H^(+)) to CH_(3)COOH`D. `CH_(3) CO CH_(3) overset(Cr_(2)O_(7)^(2-)//H^(+)) to CH_(3) COOH` |
| Answer» Correct Answer - A | |
| 509. |
`R - CH_(2)_CH_(2) OH` can be converted into `RCH_(2)COOH`. The reaction isA. reductionB. hydrolysisC. oxidationD. decarboxylation |
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Answer» Correct Answer - C We know that , `RCH_(2) CH_(2) OH overset("Oxidation ") to RCH_(2)COOH`. |
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| 510. |
`-CN` group is converted into ` - COOH` group by ,A. hydrolysisB. oxidationC. reductionD. esterification |
| Answer» Correct Answer - A | |
| 511. |
Which of the following are generally used for preparing derivatives of aldeydes and ketones ?A. Hydrocyanic acidB. HydroxylamineC. Phenyl hydrazineD. All of these |
| Answer» Correct Answer - D | |
| 512. |
The suffix used in carboxylic acid isA. `-oic`B. `-ane`C. eneD. `-al` |
| Answer» Correct Answer - A | |
| 513. |
Monocarboxylic acid are regarded as ………. Oxidation product of aldehydeA. firstB. secondC. thirdD. fourth |
| Answer» Correct Answer - A | |
| 514. |
`CH_(3)CO CH_(3)` can be converted into `CH_(3) COOH` byA. reductionB. hydrolysisC. decarboxylationD. oxidation |
| Answer» Correct Answer - D | |
| 515. |
Tautomerism is possible in (1) `CH_(3) - CHO" "(3) H-CHO` (2) `CH_(3)-CO-CH_(3)" "(4) (CH_(3))_(3)C-CHO`A. `1, 2`B. `2 , 3`C. ` 3 , 4`D. ` 1, 2, 4` |
| Answer» Correct Answer - A | |
| 516. |
Grignared reagent on reaction with ketones formsA. tertiary alcoholB. Secondary alcoholC. acetic acidD. Acetaldehyde |
| Answer» Correct Answer - A | |
| 517. |
Which of the following statements is correct regarding formic acid ?A. It is a reducing agent.B. It is a weaker acid than acetic acid.C. It is an oxidising agent.D. When its calcium salt is heated it forms acetone. |
| Answer» Correct Answer - A | |
| 518. |
Formic acid is obtained when :A. Acetaldehyde is oxidised by acidic `KMnO_(4)`B. Calcium formate is heated with calcium acetateC. Methanol is oxidised by PCCD. Methanol is oxidised by acidic dichromate |
| Answer» Correct Answer - D | |
| 519. |
Formic acid owes its origin toA. milkB. butterC. red antsD. vinegar |
| Answer» Correct Answer - C | |
| 520. |
`CH_(3) - CO - CH_(3) " and "CH_(2) = COH - CH_(3)` areA. metamersB. tautomersC. geometrical isomersD. optical isomers |
| Answer» Correct Answer - B | |
| 521. |
Aldehydes and ketone areA. tautomersB. chain isomersC. functional isomersD. position isomers |
| Answer» Correct Answer - C | |
| 522. |
What is the main reason for the fact that carboxylic acid can undergo ionization ?A. Absence of alpha - hydrogenB. Resonance stabilization of the carboxylate ionC. High reactivity of alpha- hydrogenD. Less reactivity of `alpha` - H atom |
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Answer» Correct Answer - B `RCOOH +H_(2)O to RCOO^(-)+H_(3)O^(+)` Because of resonance stabilization of carboxylate ion, the equilibrium shifts in the forward direction , thereby forming more and more of hydronium ions. |
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| 523. |
Total number of isomeric aldehydes can be calculated by formulaA. `I 2^(n-2)`B. `I = 2^(n-3)`C. `I = 2^(n-2) -1`D. `I = 2^(n)` |
| Answer» Correct Answer - B | |
| 524. |
Benzoic acid is obtained by acid hydrolysis ofA. benzonitrileB. 2- phenylethanenitrileC. phenyl isocyanideD. 2-phenylethaneisonitrile |
| Answer» Correct Answer - A | |
| 525. |
Which of the following does not give benzoic acid on hydrolysis?A. Phenyl cyanideB. Benzoyl chlorideC. Benzyl chlorideD. Methyl benzoate |
| Answer» Correct Answer - C | |
| 526. |
Which of the following carboxylic acid ismost reluctant to form ester with a given alcohol in the presence of a catalytic amount of concentrated `H_(2)SO_(4)` ?A. B. C. D. |
| Answer» Correct Answer - A | |
| 527. |
`CH_(3) COOH + CH_(3) O^(18)H overset(H^(+)) hArr A "(ester)" + B "(water)"` Alcohol contain isotopic oxygen `{O^(18)}`. The isotopic oxygen will be inA. `CH_(3)COO^(18)CH_(3)+H_(2)O`B. `CH_(3)COOCH_(3) + H_(2)O^(18)`C. both are correctD. none is correct |
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Answer» Correct Answer - A Esterification involves the breaking of C- O bond carboxylic aicd and O-H bond in alcohols. |
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| 528. |
Whch of the following gives alcohol condensation reaction?A. `C_(6)H_(5)OH`B. `C_(6)H_(5)overset(O)overset(||)C-C_(6)H_(5)`C. `CH_(3)CH_(2)-underset(O)underset(||)O-CH_(3)`D. `(CH_(3))_(3)C-underset(O)underset(||)C-C(CH_(3))_(3)` |
| Answer» Correct Answer - C | |
| 529. |
A mixture of carboxylic acid (A) and alcohol (B) on heating give and ester (C ) having molecular mass 74. What is (C ) ?A. `HCOOC_(2)H_(5)`B. `CH_(3)COOCH_(3)`C. Both a and bD. None of these |
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Answer» Correct Answer - C `(CH_(3) CO)_(2)O + CH_(3)OH overset(Delta) to CH_(3)COOH + underset("mol. mass 74") (CH_(3)COOCH_(3))` `(HCO)_(2)O+C_(2)H_(5)OH overset(Delta) to HCOOH + underset("mol. mass 74")(HCOOC_(2)H_(5)) ` |
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| 530. |
Hybridisation of carbon in - CHO group isA. spB. `sp^(2)`C. `sp^(3)`D. none of these |
| Answer» Correct Answer - B | |
| 531. |
When sodium formate is heated with soda lime, it forms:A. COB. `CO_(2)`C. hydrogenD. water vapour |
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Answer» Correct Answer - C Generally soda lime removes `CO_(2)` from and acid but it gives alkali carbonate and hydrogen. `HCO overset(-) Na+NaOH overset(CaO) to Na_(2)CO_(2)+H_(2)` |
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| 532. |
Which of the following compound does not gives benzoic acid on oxidationA. B. C. D. |
| Answer» Correct Answer - D | |
| 533. |
Identify the organic compound which on heating with strong solution of NaOH, partially converted into an acid salt and partially into alcohol.A. benzyl alcoholB. acetaldehydeC. acetoneD. benzaldehyde |
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Answer» Correct Answer - D Benzaldehyde lacks `alpha`- hydrogen atom, hence, undergo Cannizaro reaction in which it disproportionate into benzyl alcohol and sodium benzoate. `2C_(6)H_(5)CHO overset(Conc. NaOH) toC_(6)H_(5)*CH_(2)OH+C_(6)H_(5)CO overset(-)O overset(+) K` |
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| 534. |
Formalin is aA. `100%` solution of HCHOB. `40%` solution of HCHOC. `60%` solution of HCHOD. `40%` solution of `CH_(3)COOH` |
| Answer» Correct Answer - B | |
| 535. |
Benzoic acid when heated with soda lime yieldsA. benzaldehydeB. benzeneC. tolueneD. benzyla alcohol |
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Answer» Correct Answer - B `underset("Sodium benzoate")(C_(6)H_(5)CO overset(-)O overset(+)Na)+NaOH overset(CaO) underset("Heat")to underset("Benzene")(C_(6)H_(6))+Na_(2)CO_(3)` (NaOH+CaO) is called soda lime. |
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| 536. |
Which of the following is strong acid ?A. `CF_(3)COOH`B. `C Cl_(3) COOH`C. `CBr_(3) COOH`D. `CI_(3) COOH` |
| Answer» Correct Answer - A | |
| 537. |
Weakest among the following isA. `H - COOH`B. `C_(6)H_(5) - COOH`C. `o-NO_(2) - C_(6)H_(4) - COOH`D. `CH_(3) - COOH` |
| Answer» Correct Answer - D | |
| 538. |
Which of the following is weak acid ?A. B. C. D. |
| Answer» Correct Answer - A | |
| 539. |
An aldehyde group can be presentA. in between carbon chainB. at any position in carbon atomC. only at the end of carbon chainD. at the second carbon atom of the carbon chain |
| Answer» Correct Answer - C | |
| 540. |
The carbon atom of carbonyl group isA. `sp^(3) `- hybridisedB. `sp^(2)` - hybridisedC. sp - hybridisedD. `sp^(3)` - d- hybridised |
| Answer» Correct Answer - B | |
| 541. |
IUPAC name of benzophenone isA. 2-phenylpropenalB. 3-phenylbutenalC. diphenyl methanoneD. diphenyl ethanone |
| Answer» Correct Answer - C | |
| 542. |
`CH_(3)COOH` is formed by hydrolysisA. `CH_(3)NH_(2)`B. `CH_(3)CN`C. `CH_(3)CH_(2)CN`D. `CH_(3)CH_(2)NH_(2)` |
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Answer» Correct Answer - B `CH_(3)CN+2HON to underset("Acetic acid") (CH_(3)COOH+NH_(3))` |
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| 543. |
Which among the following is strongest acid ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 544. |
Which of the following is strongest acid ?A. `H - COOH`B. `C_(6)H_(5) - COOH`C. `CH_(3)- COOH`D. `CH_(3) - CH_(2) - COOH` |
| Answer» Correct Answer - A | |
| 545. |
Which of the following acid is strongestA. `CH_(3) - COOH`B. `Cl_(2)- CH_(2) - COOH`C. `Cl_(2) CH - COOH`D. `C Cl_(3) - COOH` |
| Answer» Correct Answer - D | |
| 546. |
Aldehyde group can occur,A. any where in carbon chainB. in the middle of carbon chainC. at only second carbon atom of carbon chainD. only at end of the carbon chain |
| Answer» Correct Answer - D | |
| 547. |
Which of the following is strongest acid ?A. `CH_(3)CH_(2)CH_(2)COOH`B. `CH_(3)CH_(2)CHBrCOOH`C. `CH_(3)CHBrCH_(2)COOH`D. `CH_(2)BrCH_(2)COOH` |
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Answer» Correct Answer - B Strength of acid depends upon distance between electron withdrawing group and COOH group. Distance between electron withdrawing group and COOH electron withdrawing group and COOH group increases, the strength of the acid decreases. |
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| 548. |
IUPAC name of isobutyric acid isA. 3- methylpropionic acidB. 2- methylpropanoic acidC. 3- methylbutanoic acidD. isobutanoic acid |
| Answer» Correct Answer - B | |
| 549. |
The acid which contains the aldehyde group isA. acetic acidB. formic acidC. benzoic acidD. propionic acid |
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Answer» Correct Answer - B Formic acid `(overset(H-C=O) underset(H) underset(|)|)` contains -COOH as wall as-CHO group. |
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| 550. |
Among the following the strongest acid isA. `CH_(3)COOH`B. `c_(6)H_(5)COOH`C. `m-CH_(3)OC_(6)H_(4)COOH`D. `p-CH_(3)-OC_(6)H_(4)COOH` |
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Answer» Correct Answer - B `C_(6)H_(5) COOH` is the strongest acid. In `m-CH_(3)OC_(6)COOH and p- CH_(3)OC_(6)H_(4)COOH`, the `-OCH_(3)` group being elecron donating makes the ring active. |
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