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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. |
An organic compound `(A)` on treatment with acetic acid in the presence of sulphuric acid produces an ester `(B)`. `(A)` on mild oxidation gives `( C), ( C)` with `50 %` potassium hydroxide followed by acidification with dilute hydroxide acid generates `(A)` and `(D) ,(D)` with phosphorus pentachloride followed by reaction with ammonia gives `(E) , (E)` on dehydration produces hydrocyanic acid. Identify the compounds `(A), (B), (C), (D)`, and `(E)`. |
| Answer» `{:(A=CH_(3)OH,"(Methanol)",B=CH_(3)COCH_(3),"(Methyl ethanoate)"),(C=HCHO,"(Methanal)",D=HCO OH,"(Methanoic acid)"),(E=HCONH_(2),"(Formamide or methanamide)",):}` | |
| 2. |
The correct order of increasing acid strength of the compound (A) `CH_(3)CO_(3)H " " (B) MeOCH_(2)CO_(2)H` (C) `CF_(3)CO_(2)H" " A. `DltAltBltC`B. `AltDltBltC`C. `BltDltAltC`D. `DltAltCltB` |
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Answer» Correct Answer - 1 order of decreasing acids strength `CF_(3)CO OH gt MeOCH_(2)CO OH gt CH_(3)CO OH (Me_(2)) CH.CO OH` Electron withdrawing groups increase the acid strength and electron donating groups decrease the acid strength. |
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| 3. |
Acetic acid does not undergo haloform reaction. Acetic acid has no alpha-hydrogen.A. if both assertion and reason are correct , and reason is the correct explanation of the assertion.B. If both assertion and raeson are correct, but reason is not the correct explanation of the assertionC. If assertion is correct but reason is incorrectD. If assertion is inocrrect but reason is correct |
| Answer» Compounds containing gt CO and gtCHOH group give haloform reaction. Haloform reaction is undergone only by ketones. `CH_(3)CO OH` has `3alpha` -hydrogens. | |
| 4. |
Which of the following will undergo acetylation?A. `CH_(3)CH_(2)NH_(2)`B. `CH_(3)-overset(O)overset(||)(C)-H`C. `CH_(3)CH_(2)CH_(2)OH`D. `CH_(3)-overset(O)overset(||)(C)-CH_(3)` |
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Answer» Correct Answer - A,C Hydrogen attached to nitrogen and oxygen undergo acetylation. |
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| 5. |
In above reaction, the type of intermediates formed areA. `R-overset(O)overset(||)(C)-underset(H)underset(|)(N)-Br`B. `R-N=C=O`C. `R-NH_(2)`D. All of these |
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Answer» Correct Answer - A,B Alkyl isocyanate is indermediate in Hoff-mann Bromamide Reaction. |
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| 6. |
Identify A and B in the following reaction `CH_(3)-CH_(3)overset(B)rarrCH_(3)COOHoverset(A)rarrCH_(3)CH_(2)OH`A. `{:(A,B),(HI+redP,LiAlH_(4)):}`B. `{:(A,B),(Ni//Delta,LiAlH_(4)):}`C. `{:(A,B),(LiAlH_(4),HI+red P):}`D. `{:(A,B),(Pd-BaSO_(4),Zn+HCl):}` |
| Answer» Correct Answer - 3 | |
| 7. |
Salixylic acid is prepared by reacting sodium phenoxide with carbon dioxide at `120-140^@C` under pressure. Salicylic acidA. give a violet colour with neutral ferric chlorideB. when heated slowly, it forms phenolC. is stronger acid than benoic acidD. gives a brisk efferversence with sodium bicarbonate |
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Answer» Correct Answer - A,B,C,D Due to acidic nature of salicylic acid |
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| 8. |
Statement 1 : Lower acids on reacting with strong electropositive metals give effervescence of `H_2`. `CH_3 COOC_4 H_9` hydrolyses rapidly than `CH_3 COOCH_3`.A. Statement I is true, statement -2 is true: statement -2 is a correct explanation for statement -4B. Statement -1 is true, Statement -2 is True , Statement-2 is NOT a correct explanation for statement -4C. Statement -1 is true, Statement-2 is false,D. Statement -1 is false, Statement -2 is true. |
| Answer» Correct Answer - C | |
| 9. |
Match the column `{:("Column I (Acid)","Column II " (pK_(a) "Value")),("(A) HCOOH","(p) 1.73"),("(B) " CH_(3)CO OH,"(q) 3.74"),("(C) PhCOOH","(r) 4.17"),("(D) " (CO OH)_(2),"(s) 4.75"):}` |
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Answer» Correct Answer - A-q,B-s,C-r,D-p `p^(th)` values of caboxylic acid |
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| 10. |
Statement 1 : Pure acetic acid can be converted into ice like solid called glacial acetic acid. Statement 2 : Acetic acid is stronger than HCOOH.A. Statement I is true, statement -2 is true: statement -2 is a correct explanation for statement -3B. Statement -1 is true, Statement -2 is True , Statement-2 is NOT a correct explanation for statement -3C. Statement -1 is true, Statement-2 is false,D. Statement -1 is false, Statement -2 is true. |
| Answer» Correct Answer - C | |
| 11. |
On mixiting ethyl acetate with aqueous sodium chloride, the composition of the resultant solution isA. `CH_(3)CO OC_(2)H_(5)+NaCl`B. `CH_(3)Cl+C_(2)H_(5)CO ONa`C. `CH_(3)COCl+C_(2)H_(5)OH+NaOH`D. `CH_(3)CO ONa+C_(2)H_(5)OH` |
| Answer» Correct Answer - 1 | |
| 12. |
Which one is more stronger acid RCOOOH or RCOOH ? Explain. |
| Answer» RCOOH is stronger than RCOOOH. As the carboxylate ion formed on deprotonation is more stable due to desperation of negative charge through resonance. | |
| 13. |
Arrange the following the order of nucleophilic displacement RCoCl, RCN,RCOOH,RCOOR,RCONR |
| Answer» RCOClgtRCOORgtRCO`NR_(2)`gtRCNgtRCOOH | |
| 14. |
Statement 1 : Maleic acid is more acidic than fumaric acid Statement 2 : Highly branched acids are less acidic than unbranched acids.A. Statement -1 is true, statement -2 is true, statement -2 is a correct explanation for statement 1.B. Statement -1 is true, statement 2 is true, statement -2 is not a correct explanation for statement 2C. Statement -1 is true, Statement-2 is false,D. Statement -1 is false, Statement -2 is true. |
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Answer» Correct Answer - b Acidic nature of carboxylic acids |
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| 15. |
`PCl_5 + SO_2 to X + Y, CH_3 COOH + X to CH_3 COCl` The compound X isA. `POCl_(3)`B. `SO_(2)Cl_(2)`C. `SOCl_(2)`D. `PCl_(3)` |
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Answer» Correct Answer - C `PCl_(5)+SO_(2)toPOCl_(3)+SOCl_(2)` `CH_(3)CO OH+SOCl_(2)to CH_(3)COCl+HCl+SO_(2)` |
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| 16. |
For the following compounds The correct order of reactivity towards `PCl_5` isA. `IgtIIgtIII`B. `IltIIltIII`C. `IIIltIltII`D. `IgtIIIgtII` |
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Answer» Correct Answer - D Order of reactivity towards nucleophilic subsitution reaction |
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| 17. |
The correct decreasing order of their reactivity towards hydrolysis is A. PhCOClgtp-`O_(2)NC_(6)H_(4)COCl` gt p-`CH_(3)OC_(6)H_(4)COCl`B. `PhCOCl gt p-CH_(3)OC_(6)H_(4)COCl gt p-O_(2)NC_(6)H_(4)COCl`C. `p-O_(2) NC_(6)H_(4)COCl gt PhCOCl gt p-CH_(3)OC_(6)H_(4)COCl`D. `p-O_(2)NC_(6)H_(4)COCl gt p-CH_(3)OC_(6)H_(4)Ocl gt PhCOCl` |
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Answer» Correct Answer - C Greater the electrophilicity of carbonyl carbon of acid chloride easier the hydrolysis. |
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| 18. |
Complete the following (i) `CH_(3)-CH_(2)-overset(O)overset(||)(C)-CHBr_(2) overset((i) NaOBr)underset((ii) H^(+)) to ` (ii) `C_(6)H_(5)-C_(6)H_(5)-CH_(3) overset(Cl_(2)//hv)to (A) overset(H_(2)O // OH^(+)) to (B)` |
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Answer» (i) `CH_(3)-CH_(2)-overset(O)overset(||)(C)-CHBr_(2) overset((i) NaOBr) to `[CH_(3)-CH_(2)-overset(O)overset(||)(C)-CBr_(3)]overset(OH^(Theta))to` `CH_(3)-CH_(2)-COO^(Theta)+CHBr_(3)overset(H^(+))CH_(3)-CH_(2)-COOH` (ii) `C_(6)H_(5)-CH_(3)overset(Cl_(2)//hv)toC_(6)H_(5)underset("(A)")(-)C Cl_(3) overset(H_(2)O // OH^(Theta))toC_(6)H_(5)COO^(Theta)` |
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| 19. |
Which is false about acetic acidA. It is a polar moleculeB. It form H bondsC. It is stronger than minerals acidsD. it has higher boiling point than corresponding alcohol. |
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Answer» Correct Answer - 3 Acetic acids is less acidic than mineral acids. `CH_(3)CO OH+NH_(3)` |
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| 20. |
In the following reaction, X and Y are respectively. `CH_(3)CO OH+NH_(3)to X overset(Delta)toY+H_(2)O`A. `CH_(3)CONH_(2).CH_(4)`B. `CH_(3)CO ONH_(4),CH_(3)CONH_(2)`C. `CH_(3)CONH_(2),CH_(2)CO OH`D. `CH_(3)NH_(2),CH_(3)CONH_(2)` |
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Answer» Correct Answer - 2 `toCH_(3)CO Ounderset("(X)")(NH_(4))overset(Delta)toCH_(3)underset("(Y)")(CO)NH_(2)+H_(2)O` |
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| 21. |
2.3 gm Na is added to 6 gm of `CH_(3)CO OH`. The volume of `H_(2)` gas liberated at S.T.P.A. 1.12 LB. 2.24LC. 3.36 LD. 4.48 L |
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Answer» Correct Answer - 1 `CH_(3)CO OH+Nato CH_(3)CO Ona+1/2 H_(2)` `{:("1 mole","1mole","1/2 mole"),(60 g,23 g,11.2 lit),("0.1 mole","0.1 mole",=?),(=6g,2.3 g,1.12 lit):}` |
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| 22. |
Which of the following is not derivative of carboxylic acids ?A. anhydridesB. estersC. aminesD. amides |
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Answer» Correct Answer - 3 Anines are not the derivatives of carboxylic acids |
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| 23. |
Which of the following has highest boiling point ?A. `C_(2)H_(5)OH`B. `CH_(3)CO OH`C. `CH_(3)COCH_(3)`D. `HCO OCH_(3)` |
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Answer» Correct Answer - 2 The high boiling point of acetic acid in comparision to alkanes, alkyl halides or alcohols of nearly same molecular masses is due to more strong hydrogen bonds between acetic acid molcules. |
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| 24. |
In vinegar the concentration of acetic acid is nearlyA. 0.05B. 0.02C. 6-10%D. 1 |
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Answer» Correct Answer - 3 6-10 % acetic acid is vinegar |
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| 25. |
Indicate which compound amongst the following would not undergo-Hoffmann Bromamide reactionA. B. C. D. |
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Answer» Correct Answer - A,B,D N-hydrogen atom of N-Bromoamide must be present in second step of hofmann rearang ment mechanism |
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| 26. |
Lower carboxylic acids are souble in water due toA. Low molecular weightB. Hydrogen bondingC. Dissociation into ionsD. Easy hydrolysis |
| Answer» Correct Answer - 2 | |
| 27. |
Which of the following statements is/are correct ?A. the two carbon-oxygen bond lengths in molecular formic acids are differentB. the two carbon-oxygen bond length in sodium formate are equalC. partial resonance is there in formic acidD. all of the above |
| Answer» Correct Answer - 4 | |
| 28. |
Which graph represents correct for boiling point of:- (1) Ethane (2) Ethyl alcohol (3) Acetic AcidA. B. C. D. |
| Answer» Correct Answer - 3 | |
| 29. |
Heating calcium salt of benzoic acid yieldsA. B. C. D. |
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Answer» Correct Answer - D Undergoes decarboxylation to form Benzophenone |
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| 30. |
The hydrolysis of ethane nitrile with dilute sulphuric acid givesA. ethanoic acidB. propanoic acidC. Methanoic acidD. Ethanamide |
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Answer» Correct Answer - A Alkane nitrite on hydrolysis gives carboxylic acids. |
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| 31. |
Which of the following reaction is used to decrease number carbon ?A. Hundsdicker reactionB. Wurtz reactionC. Decarboxylation reactionD. Riemer Tiemann reaction |
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Answer» Correct Answer - A::C `R-overset(O)overset(||)C-OAGoverset(Br_(2)//"CC"l_(4))toR-Br+AgBr+CO_(2)(uarr)` `R-overset(O)overset(||)C-OHunderset(Delta)overset("Soda lime")tor-H+CaCO_(3)` |
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| 32. |
Which product is formed when the compound is treated with concentrated aqueous KOH solution ?A. B. C. D. |
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Answer» Correct Answer - 2 Phenol is more stable than alcohol due to formation of more stable conjugate base after removal of `H^(+)` from phenol. |
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| 33. |
`CH_3CH_2 COOH overset(Cl_2//Fe)rarr (X) overset(Alc.) underset(KOH)rarr (Y)` Compound `(Y)` is : |
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Answer» Correct Answer - 3 `CH_(3)CH_(2)CO OH overset(Cl_(2))toCH_(3)CHCl.CO OH overset(KOH alc)underset(-HCl)toCH_(2)=CH.CO HO` |
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| 34. |
A and B areA. `CH_(3)CH_(2)O OH,CH_(3)CH_(2)OH`B. C. D. `H_(2)underset(OH)underset(|)(C)-CH_(2)-CO OHH_(2)underset(OH)underset(|)(C)-underset(OH)underset(|)(C)H_(2)` |
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Answer» Correct Answer - c Hydrolysis of glycidic ester (epoxy ester) gives aldehyde as one of the products. |
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| 35. |
Which of the following keto esters are not likely to be obtained by Claisen condensation?A. `CH_(3)CH_(2)-overset(O)overset(||)(C)-underset(CH_(3))underset(|)(CH)-overset(O)overset(||)(C)-OC_(2)H_(5)`B. `(CH_(3))_(2)CH-overset(O)overset(||)(C)-C(CH_(3))_(2)-overset(O)overset(||)(C)-C_(2)H_(5)`C. D. `CH_(3)CH_(2)-overset(O)overset(||)(C)-CH_(2)CH_(2)-overset(O)overset(||)(C)-OC_(2)H_(5)` |
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Answer» Correct Answer - d `beta`keto ester is formed in claisen condensation |
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| 36. |
Which of the following keto esters are not likely to be obtained by Claisen condensation?A. B. C. D. |
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Answer» Correct Answer - b,d `beta`-ketoester having an active methylene group is acidic and react with `C_(2)H_(5)Ona` to form enolate salt in IV step of claisen condensation mechanism. |
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| 37. |
The missing product X in the given reaction is `CH_3 COOAg + I_2 to X + AgI + CO_2`A. IodomethaneB. Ethyl IodideC. Methyl ethanoateD. Ethanal |
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Answer» Correct Answer - C With iodine usual Hunsdeicker reaction does not take place rather simmonin reaction occurs. |
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| 38. |
In which pair (s) of reagents will each member of the pair react separately with ethanoic acid `(CH_3 CO_2 H)`?A. `H_(2)SO_(4), NaOH`B. `NH_(3), PCl_(3)`C. `H_(2)SO_(4), PCl_(3)`D. `NH_(3), Cl_(2)` |
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Answer» Correct Answer - B,D `NH_(3).PCl_(3) & Cl_(2).red p` can react with acetic acid. |
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| 39. |
Silver benzonate will react with bromine in acetone to giveA. B. C. D. |
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Answer» Correct Answer - B Borodine hundieker reaction. |
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| 40. |
On applying alkali solution followed by acidification which of the following gives lactone.A. B. C. D. |
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Answer» Correct Answer - A Canninzeros reaction followed by formation of cylic ester. |
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| 41. |
`alpha`-chloropropanoic acid on treatment with alcoholic acid KOH followed by acidification gives :A. `CH_(3)-CH(OH)-CO OH`B. `CH_(2)=CH-CO OH`C. `HO-CH_(2)-CH_(2)-CO OH`D. `CH_(3)-CH_(2)-CO OH` |
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Answer» Correct Answer - 3 `CH_(3)CHClCO OH overset(alc KOH)toCH_(2)=CHCO OH` |
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| 42. |
The mechanism of nucleophilic acyl substitution in the acyl derivative proceedds as follows which among the following is false?A. B. C. D. |
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Answer» Correct Answer - B Intermediate formed usually eliminates a Leaving group. Elimination leads to regeneration of carbon oxygen double bond. |
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| 43. |
The weaker acid among the following isA. `CH_(3)CO OH`B. `ClCH_(2)CO OH`C. `Cl_(3)C C O OH`D. `(CH_(3))_(2)CHCO OH` |
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Answer» Correct Answer - 4 Due to +I effect of `CH_(3)` groups |
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| 44. |
Which of the following carboxylic acids is not reduced to the corresponding `1^@` alcohol by `LiAlH_4`?A. `CH_(3)CH(CH_(3))CO OH`B. `(Z)-CH_(3)CH=CHCH_(2)CO OH`C. `p-O_(2)NC_(6)H_(4)CO OH`D. Cyclohexanecarboxylic acid |
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Answer» Correct Answer - c Due to strong -M effect of `-NO_(2)` group |
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| 45. |
Among ethabol (I) Acetic acid (II) phenol (III) and Benzoic acid (IV) the correct order of increasing acid strength isA. I ltIIltIIIltIVB. IltIIIltIIltIVC. IltIIIltIVltIID. IIIltIVltIltII |
| Answer» Correct Answer - 2 | |
| 46. |
Carboxylic acids react with diazomethane to yield :A. AminesB. AlcoholsC. EstersD. amides |
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Answer» Correct Answer - 3 `RCO OH+CH_(2)N_(2)toRCO OCH_(3)+N_(2),` methyl esters are formed |
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| 47. |
Which of the following reactions of acetic acid involve C-OH bond acids ? I. Action with Na II. Formation of acid chloride III Action with `NaHCO_(3)` IV. Formation of an esterA. I,IIB. II,IIIC. III,IVD. II,IV |
| Answer» Correct Answer - 4 | |
| 48. |
Reaction between dry ice and methyl magnesium bromide gives an addition compound which acidification yields:A. ethanoic acidB. propanoic acidC. ethanalD. ethanol |
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Answer» Correct Answer - A `CH_(3)MgBr+CO_(2)overset(O^(@)C)toH_(3)C-overset(O)overset(||)(C)-O-Mg-Br overset(H_(3)O^(+))toCH_(3)CO OH` |
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| 49. |
How many moles of ethyl lithium is required to transform 1 mole of reactant into product? |
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Answer» Correct Answer - 3 3, one `C_(2)H_(5)Li` reacts with -OH and two reacts with -COOH. |
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| 50. |
`C_(2)H_(5)-underset(O)underset(||)(C)-Br overset("I R -Mg-x(EXCESS)")underset((ii) H_(2)O^(o+))to CH_(3)-overset(CH_(3))overset(|)(C)H-overset(C_(2)H_(5))overset(|)underset(OH)underset(|)(C)-underset(CH_(3))underset(|)(CH)-CH_(3)` The alkyle group R of the reagent will be :A. `CH_(3)-CH_(2)-`B. `CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(2)-`C. `CH_(3)-`D. `CH_(3)-overset(CH_(3))overset(|)(C)H-` |
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Answer» Correct Answer - d G.R. used `(CH_(3))_(2)CH-Mg-X` |
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