InterviewSolution
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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. |
Mention the uses of formaldehyde. |
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Answer» 1. 40% aqueous solution of formaldehyde is called formalin. It is used for preserving biological specimens. 2. Formalin has hardening effect, hence it is used for tanning. 3. Formalin is used in the production of thermo setting plastic known as bakelite, which is obtained by heating phenol with formalin. |
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| 2. |
Which aldehyde does not give aldimine with etheral ammonia solution?(a) CH3CHO(b) CH3CH2CHO(C) HCHO |
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Answer» Answer is (C) HCHO |
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| 3. |
Identify the product formed when acetaldehyde reacts with ammonia?(a) CH3 - CH = NH(b) CH3 - CH2 - NH2(d) CH3 - NH2 |
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Answer» (a) CH3 - CH = NH |
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| 4. |
Which one of the following is used as, an urinary antiseptic? (a) Urotropine (b) Urea formaldehyde (c) Formalin (d) Aldimm |
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Answer» (a) Urotropine |
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| 5. |
Which one of the following is called Mesityl oxide? |
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Answer» (c) (CH3)2C = CHCOCH3 |
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| 6. |
Which one of the following is the formula of Succinic acid? (a) HOOC – CH2 – COOH (b) HOOC – (CH2)2 – COOH (c) HOOC – (CH2)4 – COOH (d) HOOC – (CH)3 – COOH |
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Answer» (b) HOOC – (CH2)2 – COOH |
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| 7. |
The IUPAC name of is .......(a) Glyceraldehyde (b) Acrolein (c) 2, 3 – dihydroxy propanal (d) Butanal |
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Answer» (c) 2, 3 – dihydroxy propanal |
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| 8. |
Match the column I and II using the code given below the column.column Icolumn IIA. BenzophenoneB. AcetophenoneC. Phenyl methanalD. Propanone4. C6H5 - CHOABCDa1234b3142c4321d2413 |
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Answer» (b) 3 1 4 2 |
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| 9. |
Fill in the blanks1. ……. is used to convert acetic acid to ethane at 473 K.2. ……. reaction is generally used for the preparation of esters of higher alcohol from that of a lower alcohol. 3. Formic acid is used in medicine for treatment of ………4. The conversion of acetamide to methylamine by the action of caustic alkali and Bromine is known as ………5. ……. is used as food preservative. 6. ……. is used in the detection and estimation of – OH, – NH2 , groups in organic compounds.7. ……. is used in the preparation of artificial fruit essences.8. The conversion of Benzene to Benzaldehyde by the action of carbon monoxide and HCl is known as ……9. The product formed when formaldehyde condensed with acetone is …….10. Benzaldehyde condenses with acetaldehyde to form ……… |
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Answer» 1. HI + Red P 2. Transesterification 3. Gout 4. Hoff mann’s degradation 5. Sodium benzoate 6. Acetyl chloride 7. Ethyl acetate 8. Gattermann – koch reaction 9. 4 – hydroxy – butane – 2 – one 10. Cinnamaldehyde |
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| 10. |
O3 reacts with CH2 = CH2 to form ozonide. On hydrolysis it forms ……(a) Ethylene oxide(b) HCHO(c) CH3 CHO |
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Answer» O3 reacts with CH2 = CH2 to form ozonide. On hydrolysis it forms HCHO |
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| 11. |
Reduction of > C = O to – CH2 can be carried out with .....(a) Ni (b) Na/C2H5OH (c) NH2 – NH2 + C2HONa(d) LiAIH4 |
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Answer» (c) NH2 – NH2 + C2HONa |
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| 12. |
The IUPAC name of crotanaldehyde CH3 – CH = CH – CHO is ………(a) Prop – 2 – enal (b) But – 2 – enal (c) Ethenal (d) Phenyl methanal |
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Answer» (b) But – 2 – enal |
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| 13. |
The IUPAC name of HOOC – (CH2)4 – COOH is ……… (a) Adipic acid (b) Butane dioic acid(c) Hexane diolc acid (d) Glutaric acid |
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Answer» (c) Hexane diolc acid |
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| 14. |
Tdentifý the product “C” in the sequence of the reaction(a) CH3CH2NH2 (b) CH3CH2OH (c) CH2 = CH2 (d) CH3CHO |
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Answer» (c) CH2 = CH2 |
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| 15. |
In which of the following reactions new carbon – carbon bond is not formed? (a) Aldol condensation (b) Friedel craft reaction (c) Kolbe’s reaction (d) Wolf kishner reduction |
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Answer» (d) Wolf kishner reduction |
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| 16. |
Which one of the following is the hybridised state of C atoms in carbonyl carbon?(a) sp (b) sp3d (c) sp3 (d) sp2 |
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Answer» sp2 is the hybridised state of C atoms in carbonyl carbon. |
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| 17. |
What are the uses of acetic acid? |
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Answer» Acetic acid is used in: 1. as table vinegar 2. for coagulating rubber latex 3. for manufacture of cellulose acetate and poly vinylacetate |
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| 18. |
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ………(a) more extensive association of carboxylic acid via van der Waals force of attraction (b) formation of carboxylate ion (c) formation of intramolecular H – bonding (d) formation of intermolecular H – bonding |
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Answer» (d) formation of intermolecular H – bonding |
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| 19. |
Which one of the following is used as a catalyst in Knoevenagal reaction?(a) Pyrimidine(b) Pyridine (c) PCC (d) CdCl2 |
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Answer» (b) Pyridine |
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| 20. |
What is the colour change take place when Fehling’s solution is added to an aldehyde? (a) Red to blue (b) Blue to red (c) Red to green (d) Green to blue |
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Answer» (b) Blue to red |
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| 21. |
Which one of the following is the formula of Schiff’ s base’?(a) C6H5 – NH NH2 (b) C6H5 CH = N – C6H5 (b) Perkin’s reaction (d) Aldol condensation |
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Answer» (b) C6H5 CH = N – C6H5 |
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| 22. |
Which one of the following is used in silvering of mirrors? (a) Paraldehyde (b) Benzaldehyde (c) Acetone (d) Acetaldehyde |
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Answer» (d) Acetaldehyde |
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| 23. |
Which one of the following is used for preserving biological specimens?(a) Urotropine (b) Formalin (c) Schiff’s base (d) Benzoin |
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Answer» Formalin is used for preserving biological specimens |
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| 24. |
Match the column I and II using the code given below the column.column Icolumn IIA. CH3 - CH = CH - CH3 + O3 → ?1. 2HCHO2. CH3CHO + HCHOC. CH2 = CH2 + O3 → ?3. 2CH3CHOD. CH3 - CH = CH2 O3 → ?4. CH3CHO + CH3COCH3ABCDa1234b4321c3412d2143 |
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Answer» (c) 3 4 1 2 |
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| 25. |
The JUPAC name of is ......(a) Benzene carboxylic acid (b) Benzoic acid (c) 2 – phenyl ethanoic acid (d) 2 – phenyl acetic acid |
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Answer» (c) 2 – phenyl ethanoic acid |
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| 26. |
Fill in the blanks.1. RDX is also called ……. or ………2. With ammonia, benzaldehyde form a complex condensation product called ……3. The oxidation of unsymmetrical ketone is governed by ……….4. The reducing agent used in Clemmensen reduction is ……5. The reducing agent used in woif-kishner reduction is ……6. Symmetric diols are called ………7. Aldehydes which do not have ……… undergo disproportionation reaction (or) cannizaro reaction.8. The reagent used in the conversion of Benzaldehyde to Benoin is ……9. In Knoevenagal reaction …………. act as the basic catalyst.10. The formula of Benzal aniline (or) Schiffs base is ……… |
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Answer» 1. Cyclonite(or)cyclotrimethylene trinitramine 2. Hydrobenzamide 3. Popott’s rule 4. Zn + Hg / conc.HCl 5. NH2 – NH2 + C2H5ONa 6. Pinacol 7. a – hydrogen atom 8. Alcoholic KCN 9. Pyridine 10. C6H5CH = N – C6H5 |
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| 27. |
What are the reagents required to prepare Benzal aniline (or) Schiff’s base?(a) Benzyl amine + Ammonia (b) Benzal amine + Ammonia(c) Benzaldehyde + Aniline(d) Phenol + Aniline |
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Answer» (c) Benzaldehyde + Aniline |
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| 28. |
Which one of the following is formed when phenol is heated with formalin? (a) Bakelite (b) PVC (c) Polyurethane (d) Polyester |
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Answer» Bakelite is formed when phenol is heated with formalin. |
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| 29. |
Which one of the following is used as a hypnotic? (a) Acetaldehyde (b) Formalin (c) Paraldehyde (d) Formaldehyde |
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Answer» (c) Paraldehyde |
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| 30. |
Match the column I and II using the code given below the column.column Icolumn II1. 2C6H5COCH3 + 2CaCO32. HCHO + CaCO33. 2CH3CHO + 2CaCO34. CH3COCH3 + CaCO3ABCDa2341b1234c3412d4123 |
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Answer» (a) 2 3 4 1 |
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| 31. |
Acetone and acetaldehyde are differentiated by ……..(a) NaOH + I2 (b) Ag(NH3)+2 (Tollens’s reagent) (c) I2 (d) NaOH + NH3 |
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Answer» (b) Ag(NH3)2+ (Tollens’s reagent) |
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| 32. |
Consider the following statements:(i) Formaldehyde is a gas at room temperature and acetaldehyde is a volatile liquid. (ii) The oxidation of symmetrical ketones is governed by Popoti’s rule. (iii) Aliphatic aldehyde react with primary amines in the presence of base gives Schiff’s base. Which of the above statement is/are not correct? (a) (i) only (b) (ii) only (c) (ii) & (iii) (d) (i) & (ii) |
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Answer» (c) (ii) & (iii) |
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| 33. |
Identify the reagents X and Y are ………(a) X = MgCl2 Y = CH3CH = CH2(b) X = CH3MgCI Y = C6H5COCH3 (c) X = CH3MgCI Y = (CH3)3C – OH(d) X = C6H5 MgCI Y = (CH3)3C – OH |
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Answer» (c) X = CH3MgCI Y = (CH3)3C – OH |
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| 34. |
RDX is otherwise named as ………(a) Cyclonite (b) Cyclohexane (c) 1, 4 – dione (d) Cyclohexanol |
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Answer» (a) Cyclonite |
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| 35. |
What is Vinegar? How will you get glacial acetic acid? |
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Answer» 1. Vinegar is 6 to 8% solution of acetic acid in water. 2. Pure acetic acid is called glacial acetic acid. Because it forms ice like crystal when cooled. When aqueous acetic acid is cooled at 289.5 K, acetic acid solidifies and forms ice like crystals, where as water remains in liquid state and removed by filtration. This process is repeated to obtain glacial acetic acid. |
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| 36. |
Match the column I and II using the code given below the column.column Icolumn IIA. Stephen's reactionB. Rosenmund reductionC. Gattermann Koch reactionD. Friedel crafts BenzoylationABCDa1234b4321c2143d3412 |
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Answer» (d) 3 4 1 2 |
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| 37. |
Consider the following statements. (i) Terminal olefins gives Formaldehyde as one of the product (ii) Oxidation of alcohols using pcc yield carboxylic acids (iii) Catalytic dehydrogenation of alcohols give either aldehyde or ketone.Which of the above statement is/are not correct? (a) (ii) only (b) (i) & (iii) (c) (ii) & (iii) (d) (ii) only |
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Answer» (a) (ii) only |
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| 38. |
Which one of the following is used in the preparation of Artificial fruit essences? (a) Ethanoic acid (b) Acetamide (c) Ethyl acetate (d) Acetic anhydride |
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Answer» (c) Ethyl acetate |
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| 39. |
Which one of the following is formed when acetic acid is heated with phosphorous pentoxide?(a) CH3COCH3 (b) CH3CONH2 (c) CH4 (d) (CH3CO)2O |
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Answer» (d) (CH3CO)2O |
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| 40. |
The reaction of acetic acid with Cl2 and red phosphorous is named as …… (a) Kolbe’s reaction (b) Reimer – Tiemann reaction (c) HeII – volhard – zelinsky reaction (d) Knoevenagal reaction |
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Answer» (c) HeII – volhard – zelinsky reaction |
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| 41. |
Match the column I and II using the code given below the column.column I column IIA. HCHO + NH3B. CH3CHO + NH32. (CH2)6N4C. 2CH3COCH3 + NH33. CH3CH = NHD. 2C6H5CHO + NH3ABCDa2314b4231c3142d1423 |
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Answer» (a) 2 3 1 4 |
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| 42. |
Aldehyde turns pink with ……… (a) Benedict solution (b) Schiff ‘s base (c) Fehiing solution (d) Tollen’s reagent |
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Answer» (b) Schiff ‘s base |
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| 43. |
Which of the following is used in the preparation of benzhydrol drop?(a) Benzaldehyde (b) Benzophenone (c) Acetophenone (d) Benzoin |
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Answer» (b) Benzophenone |
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| 44. |
The IUPAC name of Acrolein is (a) Prop – 2 – enal (b) Propanal (c) Ethenal (d) 1 – butanal |
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Answer» (a) Prop – 2 – enal |
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| 45. |
Why acid anhydride are preferred to acyl chloride for carrying out acylation reactions? |
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Answer» Acid anhydride are preferred to acyl chloride for carrying out acylation reactions. Because 1. Easily available 2. Cheap 3. Easy to prepare 4. Easily undergo acylation without irritating odours |
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| 46. |
Which one of the following is formed when ethanoic acid is treated with HI and Red phosphorous? (a) Ethane (b) Ethene(c) Ethyne (d) Methane |
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Answer» Ethane is treated with HI and Red phosphorous |
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| 47. |
Match the column I and II using the code given below the column.column I column IIA. Cinnmaldehyde1. Rosenmunds reductionB. Cinnamic acid2. Friedel crafts reactionC. Acetaldehyde3. Perkin's reactionD. Benzophenone4. Claisen schmidt condensationABCDa4312b1234c2143d3421 |
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Answer» (a) 4 3 1 2 |
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| 48. |
Indicate the uses of Benzoic acid. |
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Answer» Benzoic acid is used in : 1. as food preservative either in the pure form or in the form of sodium benzoate 2. in medicine as an urinary antiseptic 3. for manufacture of dyes |
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| 49. |
What is the name of the reaction when benzaldehyde changes into Benzyl alcohol?(a) Friedel – crafts reaction(b) Kolbe’s reaction(c) Cannizaro reaction (d) Wurtz reaction |
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Answer» (c) Cannizaro reaction |
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| 50. |
Which one of the following aldehyde is derived from vitamin B, function as a co – enzyme?(a) Pyridoxal (b) Formaldehyde (c) Ethanal (d) Propanal |
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Answer» (a) Pyridoxal |
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