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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.
| 1. |
Which of the following statements are correct ?A. Oximes are stronger acid than hydroxylamine.B. `pK_a` of maleic acid is less than `pK_a` of fumaric acid.C. `Me_3 SiCH_2 COOh` is a stronger acid than `Me_3 C-CH_2 COOH`.D. o-Nitrobenzoic acid is a weaker acid than 3,5-dinitrobenzoic acid. |
| Answer» Correct Answer - A::B | |
| 2. |
Which of the following reactions are correcyA. `CH_3 COOH overset (Delta) underset (973 K) rarr CH_2 = C = O("Ketene")`B. `HCOOH underset (Conc. H_2 SO_4) rarr CO + H_2 O`C. D. |
| Answer» Correct Answer - A::B::D | |
| 3. |
Give the decreasing order of ease of decarboxylation of the following acids when reacted with soda lime. (I) `Cl_3 C - COOH` (II) `Br_3 C-COOH` (III) `CH_3 COOH` (IV) `PhCOOH`.A. `(I) gt (II) gt (III) gt (IV)`B. `(I) gt (II) gt (IV) gt (III)`C. `(IV) gt (III) gt (II) gt (I)`D. `(III) gt (IV) gt (II) gt (I)`] |
| Answer» Correct Answer - B | |
| 4. |
The OH group of an alcohol or the `-COOH` group of a carboxylic acid can be replaced by `-Cl` usingA. chlorineB. hydrochloric acidC. Phosphorus pentachlorideD. hypochlorous acid |
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Answer» Correct Answer - C See properties of acids |
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| 5. |
In the compound gives below, the correct order of acidity of the positions (X), (Y) and (Z) isA. `Z gt X gt Y`B. `X gt Y gt Z`C. `X gt Z gt Y`D. `Y gt X gt Z` |
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Answer» Correct Answer - B Position X is most acidic because of resonance stabilisation of carbonxylate anion, `-overset(+)(N)H_(3)` (Y) will be comparatively more acidic than that of `-overset(+)(N)H_(3)` (Z) due to the closeness of electron withdrawing `-COOH` group of Y |
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| 6. |
Identify the product (E ) in the following sequence of reactions: A. B. C. D. |
| Answer» Correct Answer - B | |
| 7. |
Which of the following sequence of reactions can gives A. B. C. D. `C_(6)H_(5)Brunderset(H^(+)//H_(2)O)overset(CO_(2))tounderset(AlBr_(3))overset(Br_(2))to` |
| Answer» Correct Answer - B::C | |
| 8. |
The compound is used as A. antisepticB. antibioticC. analgesicD. pesticide |
| Answer» Correct Answer - C | |
| 9. |
The following sequence of reactions on `A` gives A. B. C. D. |
| Answer» Correct Answer - C | |
| 10. |
Match the list, I with List II and select the correct answer using the codes given below the lists: A. `{:(A,B,C,D),(2,4,1,3):}`B. `{:(A,B,C,D),(3,2,4,1):}`C. `{:(A,B,C,D),(1,3,2,4):}`D. `{:(A,B,C,D),(4,1,3,2):}` |
| Answer» Correct Answer - B | |
| 11. |
An organic liquid of the composition `C_(4)H_(8)O_(2)` yields a sodium salt of an acid `C_(3)H_(6)O_(2)` and methanol on boiling with NaOH solution. The given liqud isA. `CH_(3)CH_(2)COOCH_(3)`B. `CH_(3)COOC_(2)H_(5)`C. `HCOOC_(3)H_(7)`D. `CH_(3)CH_(2)CH_(2)COOH` |
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Answer» Correct Answer - A `H_(3)C-CH_(2)-overset(O)overset("||")(C)-O-CH_(3) overset(NaOH)(rarr) H_(3)C-CH_(2)-overset(O)overset("||")(C)-ONa+CH_(3)OH`. |
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| 12. |
Acetyl chloride reacts with ether in the presence of zinc chloride to form:A. `CH_(3)COOCOCH_(3) + C_(2)H_(5)Cl`B. `CH_(3)COOC_(2)H_(5) + CH_(3)Cl`C. `CH_(3)COOC_(2)H_(5) + C_(2)H_(5)Cl`D. `CH_(3)COOH + C_(2)H_(5)Cl` |
| Answer» Correct Answer - A | |
| 13. |
Acid hydrolysis of which of the following compounds yields two different organic compounds?A. `CH_(3)COOH`B. `CH_(3)COOC_(2)H_(5)`C. `(CH_(3)CO)_(2)O`D. `CH_(3)CONH_(2)` |
| Answer» Correct Answer - D | |
| 14. |
Which one of the following forms micelles in aqueous solution above certain concentration?A. UreaB. Dodecyl trimethyl ammonium chlorideC. Pyridinium chlorideD. Glucose |
| Answer» Correct Answer - B | |
| 15. |
Detergents are known to pollute rivers and water ways. However, detergents can be made biodegradable and pollution free by taking :A. cyclic hydrocarbon chainB. shorter hydrocarbon chainC. unbranched hydrocarbon chainD. hydrocarbons with more branching |
| Answer» Correct Answer - C | |
| 16. |
The correct order of increasing strength of the compounds (a) `CH_(3)CO_(2)H` (b) `MeOCH_(2)CO_(2)H` (c) `CF_(3)CO_(2)H` (d) A. `b lt d lt a lt c`B. `d lt a lt c lt b`C. `d lt a lt b lt c`D. `a lt d lt c lt b` |
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Answer» Correct Answer - C Meo acts as an electron withdrawing group on a saturated carbon and hence acid (B) is stronger than acid (A and D) |
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| 17. |
Carboxylic acids having atleast one `alpha`-hydrogen react with `Cl_(2) or Br_(2)` in the presence of phosphorus ( or a phosphorus halide) to give `alpha`-halo acids. This reaction is known as Hell-Volhard-Zelinsky reaction (HVZ reaction), `R-CH_(2)COOHunderset(Delta)overset(P//Br_(2))toR-overset(Br)overset(|)"CH"-COOH` The HVZ reaction is limited to the formation of `alpha`-chloro and a-bromo acids and it is sometimes awkward to carry out. The reagents ( `X_(2)` and P) are noxious and the reaction time is often long and the conditions of reaction are harsh. `CH_(3)COOHoverset(Br_(2)//Red P)to(A)overset(NaCN)to(B)overset(HOH//H^(+))to(C )` The product (C) will be:A. B. C. D. |
| Answer» Correct Answer - A | |
| 18. |
Carboxylic acids are functional isomers ofA. alcoholsB. estersC. both alcohols and estersD. acid anhydride |
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Answer» Correct Answer - B Carboxylic acids and esters are functional isomers. |
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| 19. |
Which of the following compounds is produced when `alpha`-chloroacetic acid is heated with Ag powder?A. Acetic acidB. AcetoneC. Maleic acidD. Succinic acid |
| Answer» Correct Answer - D | |
| 20. |
Which of the following has the highest boiling point?A. `CH_(3)OCH_(2)CH_(3)`B. `CH_(3)CH_(2)CH_(2)OH`C. `CH_(3)COOH`D. `CH_(3)CH_(2)CH_(2)CH_(3)` |
| Answer» Correct Answer - C | |
| 21. |
Amongst the acids (a) HC= CCOOH.(b) `H_(2)C=CHCOOH and (c) CH_(3) CH_(2)COOH`, the acid strength follows the sequence:A. `(a)gt (b) gt (c)`B. `(a) lt (b) lt (c) `C. (a) = (b) = (c)D. `(a) = (b) lt (c) ` |
| Answer» Correct Answer - A | |
| 22. |
Identify the method by which `Me_(3)"CC"O_(2)`H can be prepared:A. treating 1 mol of MeCOMe with 2 moles of MeMglB. treating 1 mol of `MeCO_(2)` Me with 3 moles of MeMglC. treating 1 mol of MeCHO with 3 moles ofMeMglD. treating I mol of dry ice with 1 mol of `Me_(3)CMgl` |
| Answer» Correct Answer - D | |
| 23. |
Cyanogen on hydrolysis with dil. HCl gives:A. formic acidB. acetic acidC. glycolD. oxalic acid |
| Answer» Correct Answer - D | |
| 24. |
The compound with mol. Mass 180 is acetylated with `CH_(3)COCl` to get acetylated compound with mol. Mass 390. The number of amino groups present per molecule of the compound isA. 2B. 5C. 4D. 6 |
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Answer» Correct Answer - B `R - NH_(2) + ClCOCH_(3) rarr R - NHCOCH_(3) + HCl` The increase in mass per acetyl group = 42 amu Total increase in mass `= 390 - 180 = 210` `:.` The number of acetyl groups added `= (210)/(42) = 5` |
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| 25. |
Urea is decomposed giving nitrogen and other substances when treated with:A. `HNO_(2)`B. `HNO_(3)`C. `H_(2)SO_(4)`(dil.)D. NaOH |
| Answer» Correct Answer - A | |
| 26. |
Which will liberate ammonia when boiled with NaOH solution?A. EthylamineB. AcetamideC. AnilineD. All of these |
| Answer» Correct Answer - B | |
| 27. |
When a fat is heated with NaOH, the substances formed are:A. oil and `Na_(2)CO_(3)`B. soap and glycerolC. soap and oilD. soapless detergent and water |
| Answer» Correct Answer - B | |
| 28. |
Tartaric acid on treatment with resorcinol and conc. `H_(2)SO_(4)` gives:A. violet colourB. blue colourC. green colourD. no colour |
| Answer» Correct Answer - B | |
| 29. |
Oxalic acid when reduced with zinc and `H_(2)SO_(4)` givesA. glyoxalic acidB. GlyoxalC. glycolic acidD. glycol |
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Answer» Correct Answer - C Oxalic acid is reduced by `Zn` and `H_(2)SO_(4)` to give glycolic acid `{:(COOH " "CH_(2)OH),("|" " "+4 H underset(H_(2)SO_(4))overset(Zn)rarr "|" " "+ H_(2)O " acid"),(COOH " "COOH),(" Oxalic acid " Glycolic acid"):}` |
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| 30. |
Oxalic acid on treatment with conc. `H_(2) SO_(4)` givesA. CO onlyB. `CO_(2)` onlyC. `CO_(2) + H_(2)O`D. `H_(2)O + CO + CO_(2)` |
| Answer» Correct Answer - D | |
| 31. |
Ethanoic acid on reaction with hydrazoic acid `(HN_(3))` yieldsA. ethylamineB. acetamideC. methylamineD. nitroethane |
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Answer» Correct Answer - C Carboxylic acid with `HN_(3)` form primary amines with one carbon less (Schmidt reaction). `CH_(3) COOH + HN_(3) rarr CH_(3) NH_(2) + CO_(2) + N_(2)` |
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| 32. |
An ester (A) with molecular formula `C_(9)H_(10) O_(2)` was treated with excess of `CH_(3)MgBr` and the compound so formed was treated with conc. `H_(2)SO_(4)` to form olefin (B). Ozonolysis of B gave ketone with formula `C_(8)H_(8)O` which shows positive iodoform test. The structure of A isA. `C_(6)H_(5)COOC_(2)H_(5)`B. `CH_(3)OCH_(2)COC_(6)H_(5)`C. `CH_(3)CO - C_(6)H_(5) - COCH_(3)`D. `C_(6)H_(5)COOC_(6)H_(5)` |
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Answer» Correct Answer - A `{:(" "O" "OH),(" ||"" |"),(underset((A))(C_(6)H_(5) C - OC_(2)H_(5)) underset(HOH)overset(2CH_(3)MgBr)rarr C_(6)H_(5) - C - CH_(3)),(" |"),(" "CH_(3)),(" "443K darr H_(2)SO_(4)),(C_(6)H_(5) - C = O + HCHO underset((ii) Zn //H_(2)O)overset((i)O_(3))larr C_(6)H_(5) - C = CH_(2)),(" |"" |"),(" "CH_(3)" " underset((B)"Alkane")(CH_(3))):}` |
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| 33. |
Methyl acetate on treating with excess of `C_(2)H_(5)MgBr` produces :A. `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)OH`B. `CH_(3)-underset(C_(2)H_(5))underset(|)overset(C_(2)H_(5))overset(|)OH`C. `C_(2)H_(5)-underset(C_(2)H_(5))underset(|)overset(C_(2)H_(5))overset(|)OH`D. `CH_(3)-underset(C_(2)H_(5))underset(|)overset(CH_(3))overset(|)OH` |
| Answer» Correct Answer - B | |
| 34. |
In a set of reactions, propionic acid yielded a compound (D). `CH_(3)CH_(2)COOHoverset(SOCl_(2))to(B)overset(NH_(3))to(C )underset(Br_(2))overset(KOH)to(D)` The structure of (D) would be:A. `CH_(3)CH_(2)NHCH_(3)`B. `CH_(3)CH_(2)NH_(2)`C. `CH_(3)CH_(2)CH_(2)NH_(2)`D. `CH_(3)CH_(2)CONH_(2)` |
| Answer» Correct Answer - B | |
| 35. |
In the given reaction X is `CH_(3)CHO + CH_(2) (COOH)_(2) overset("Pyridine" //Delta)rarr X`A. `CH_(3)COOH`B. `C_(2)H_(5)COOH`C. `CH_(3)CH = CH - COOH`D. `(COOH) CH = CH - (COOH)` |
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Answer» Correct Answer - C See Knovengeal reaction in Some Noteworthy Points |
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| 36. |
Acidic hydrolysis of acetamide givesA. AcetaldehydeB. Acetic acidC. Methyl amineD. Formic acid |
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Answer» Correct Answer - B `CH_(3)CONH_(2) + HOH overset(H^(+))rarr CH_(3)COOH + NH_(3)` |
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| 37. |
The correct statement about the compounds (a), (b) and (c) is A. a and b are identicalB. a and b are diastereomersC. a and c are enantiomersD. a and b are enantiomers |
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Answer» Correct Answer - D Rotate (a) through `180^(@)` within the plane of the paper. Now (a) and (b) are enantiomers |
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| 38. |
The relative order of esterification of the following alcohols is A. `I lt II lt III`B. `I gt II gt III`C. `I lt III lt II`D. `I gt III gt II` |
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Answer» Correct Answer - B The rate determining step for esterification is the addition of alcohol. The rate determining step involves change of hybridisation of carbonyl carbon from `sp^(2)` to `sp^(3)`, and consequently steric retardation increases as the size of alcohol increases and hence the rate of esterification decreases |
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| 39. |
Carboxylic acids readily dissolve in aqueous sodium bicarbonate, liberating carbon dioxide. Which one of the following is correct?A. The conjugate base of the carboxyhc acid is more stable than the free carboxylic acidB. Free carboxylic acid and its conjugate base are of comparable stabilityC. The free carboxylic acid is more stable than its conjugate baseD. The conjugated acid of the carboxylic acid is more stable than the free carboxylic acid |
| Answer» Correct Answer - A | |
| 40. |
The reactivity of carboxylic acids towards esterification is highest inA. acetic acidB. propionic acidC. formic acidD. iso-butyric acid |
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Answer» Correct Answer - C See A - Level Information of acids |
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| 41. |
Which of the following decarboxylates readily in the temperature range `100 - 150^(@)C` ?A. `CH_(2) = CH.CH_(2)COOH`B. `O_(2)NCH_(2)COOH`C. `NC - CH_(2)COOH`D. `CH_(3)COCH_(2)COOH` |
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Answer» Correct Answer - A See A - Level Information of acids |
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| 42. |
Rate of the reaction is fastest when Z isA. ClB. `OCOCH_(3)`C. `OC_(2)H_(5)`D. `NH_(2)` |
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Answer» Correct Answer - A See relative reactivities of acid derivatives. |
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| 43. |
Glacial acetic acid is obtained byA. distilling vinegarB. crystallizing, separating and melting acetic acidC. treating vinegar with dehyrating agentD. chemically separating acetic acid. |
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Answer» Correct Answer - B Acetic acid freezes at `16.6^(@)C` while water freezes at `0^(@)C`. So glacial acetic acid is obtained by crystallizing, separating and melting acetic acid |
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| 44. |
The name glacial acetic acid is given to pure acetic acid :A. below 289-6 K it is white liquidB. it forms ice like solide below `289-6K`C. it is mixed with methanolD. pure acetic acid above `289-6K` |
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Answer» Correct Answer - B See Acetic acid |
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| 45. |
What of the following is expected to be most highly ionised in water ?A. `CH_(2)ClCH_(2)CH_(2)COOH`B. `CH_(3)CHClCH_(2)COOH`C. `CH_(3)CH_(2)CHCICOOH`D. `CH_(3)CH_(2)"CC"l_(2)COOH` |
| Answer» Correct Answer - D | |
| 46. |
Order of hydrolysis for the following I. `RCOCl` II. `RCOOR` III. `RCONH_(2)` IV. `(RCO_(2))_(2)O`A. `I gt IV gt II gt III`B. `I gt II gt III gt IV`C. `I gt III gt II gt IV`D. `IV gt III gt II gt I` |
| Answer» Correct Answer - B | |
| 47. |
The compound that undergoes decaboxylation most readily under mild condition is :A. B. C. D. |
| Answer» Correct Answer - B | |
| 48. |
The compound that undergoes decarboxylation most readily under mild conditions areA. B. C. D. |
| Answer» Correct Answer - B | |
| 49. |
Which of the following products is formed when adipic acid is heated ?A. B. C. D. |
| Answer» Correct Answer - B | |
| 50. |
Butyric acid undergoes mild oxidation with dilute hydrogen peroxide at:A. `alpha`-positionB. `beta`-positionC. `gamma`-positionD. simultaneously at `alpha`,`beta` and `gamma`-positions |
| Answer» Correct Answer - B | |