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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.
| 51. |
Which is used as a drug to reduce fever?(a) Diethyl ether(b) Acetone (c) Acetophenone (d) Paracetamol |
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Answer» (d) Paracetamol |
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| 52. |
Match the column I and II using the code given below the column.column I column IIA. Amyl acetate1. Rospberry flavourB. Ethyl butyrate2. Orange flavourC. Isobutyl formate3. Banana flavourD. Octyl acetate4. Pinepple flavourABCDa3412b4321c1234d2143 |
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Answer» (a) 3 4 1 2 |
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| 53. |
Ethanoic acid + P/Br2 → 2 2 – bromoethanoic acid. This reaction is called ………(a) Finkeistein reaction (b) Haloform reaction (c) Hell – Volhard – Zelinsky reaction(d) none of these |
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Answer» (c) Hell – Volhard – Zelinsky reaction |
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| 54. |
Match the column I and II using the code given below the column.column I column IIA. Tollen's reagent1. Benzal anilineB. Schiff's base2. Copper sulphate + sodium citrate + NaOHC. Fehling's solution3. Ammonia cal silver nitrateD. Benedict's solution4. Copper sulphate + Potassium tartrateABCDa3142b1234c4321d2413 |
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Answer» (a) 3 1 4 2 |
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| 55. |
Which one of the following is used in the manufacture of Bakelite?(a) Methanal (b) Ethanal (c) Phenyl methanal (d) Butanal |
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Answer» (a) Methanal |
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| 56. |
Which is used in the manufacture of thermosoftening plastic perspex?(a) Acetaldehyde(b) Formaldehyde(c) Acetone (d) Acetophenone |
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Answer» Acetone is used in the manufacture of thermosoftening plastic perspex |
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| 57. |
Aldehydes and ketones are reduced to hydrocarbon by the action of ……(a) LiAlH4 (b) H2 / Pd + BaSO4 (c) Na + Hg/HCI (d) NH2 – NH2/C2H5ONa |
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Answer» (d) NH2 – NH2 / C2H5ONa |
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| 58. |
Which one of the following is used as a medicine in the treatment of gout?(a) CH3COOH (b) C6H5COOH (c) CH3CONH2(d) HCOOH |
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Answer» HCOOH is used as a medicine in the treatment of gout. |
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| 59. |
Consider the following statements.(i) Carboxylic acids turn red litmus blue.(ii) Carboxylic acids give brisk efferrescence with NaHCO3(iii) Carboxylic acid is warmed with alcohol and conc. H2SO4 gives fruity odour ester. Which of the above statement is/are not correct?(a) (i) only (b) (ii) only (c) (iii) only(d) (i) & (iii) |
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Answer» (a) (i) only |
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| 60. |
Bakelite is a thermosetting plastic produced by ……(a) HCHO + C6H5CH2OH (b) HCHO + C6H5OH (c) CH3CHO + C6H5OH (d) HCHO + CH3COCH3 |
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Answer» (b) HCHO + C6H5OH |
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| 61. |
Which one of the following is used as a coagulating agent for rubber latex?(a) Ethanoyl chloride (b) Butanoic acid (c) Methanoic acid (d) Benzoic acid |
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Answer» (c) Methanoic acid |
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| 62. |
The molecular formula of Urotropine is ………(a) (CH2)6N4 (b) (CH2)4N6 (c) (CH2)2N2 (d) (CH2)6N6 |
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Answer» (a) (CH2)6N4 |
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| 63. |
Which one of the following can act as a reducing agent?(a) C6H5COOH(b) HCOOH(c) CH3COOH(d) CH3 – CH2COOH |
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Answer» HCOOH can act as a reducing agent. |
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| 64. |
Match the column I and II using the code given below the column.column I column IIA. Formic acid1. Food preservativeB. Acetic acid2. Dehydration of hidesC. Benzoic acid3. Artificial fruit essencesD. Ethyl acetate4. Table VinegarABCDa2413b1234c4321d3142 |
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Answer» (a) 2 4 1 3 |
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| 65. |
Cinnamic acid is formed when C6H5CHO condenses with (CH3CO)2 O in the presence of …… (a) Conc.H2SO4 (b) CH3COONa (c) Na metal (d) Anhydrous ZnCI2 |
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Answer» (b) CH3COONa |
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| 66. |
Which of the following is incorrect?(a) FeCl3 is used in the detection of phenols (b) Fehlings solution is used in the detection of aldehyde (c) Tollen’s reagent is used in the detection of unsaturation (d) NaHSO3 is used in the detection of carbonyl compounds |
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Answer» (c) Tollen’s reagent is used in the detection of unsaturation |
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| 67. |
Which one of the following should be subjected to reductive ozonolysis to get only formal dehyde? (a) CH ≡ CH(b) CH3 – CH = CH2 (c) CH2 = CH2 (d) CH3 – CH3 |
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Answer» (c) CH2 = CH2 |
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| 68. |
Mention the uses of formic acid? |
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Answer» Formic acid is used in: 1. for the dehydration of hides. 2. as a coagulating agent for rubber latex 3. in medicine for treatment of gout 4. as an antiseptic in the preservation of fruit juice |
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| 69. |
Assertion(A): Formic acid can act as a strong reducing agentReason (R): Formic acid contains both aldehyde as well as an acid group.(a) Both A and R are wrong (b) A is correct but R is wrong (c) A is wrong but R is correct (d) Both A and R are correct and R is the correct explanation of A. |
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Answer» (d) Both A and R are correct and R is the correct explanation of A. |
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| 70. |
Find the odd one out and give the reasons(a) HCHO(b) C6H5CHO(c) CCI3CHO (d) CH3CHO |
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Answer» (d) CH3CHO CH3CHO. It contains α – H atom and undergoes aldol condensation where as others do not have α – H atoms and they undergo cannizaro reactions. |
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| 71. |
Which of the following products is formed when Benzaldehyde is treated with CH3MgBr and the addition product so obtained is subjected to acid hydrolysis? (a) Secondary alcohol (b) Primary alcohol(c) Phenol (d) Tertiary alcohol |
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Answer» (a) Secondary alcoho |
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| 72. |
Which of the following reagent is used to get aldehyde from alcohol by oxidation method?(a) Na2Cr2O7 (b) KMnO4 (c) PCC (d) LiAlH4 |
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Answer» PCC is used to get aldehyde from alcohol by oxidation method. |
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| 73. |
Identify the products formed when But- 1-ene undergoes reductive ozonolysis? (a) HCHO + CH3CHO (b) HCHO + CH3CH2CHO (c) CH3COCH3 + CH3CHO (d) HCHO + CH3COCH3 |
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Answer» (b) HCHO + CH3CH2CHO |
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| 74. |
Match the column I and II using the code given below the column.column I column IIA. CH2 = CH - CHO1. But - 2 - enalB. CH3 - CH + CHO1. Butan - 1 - al3. Prop- 2 - enalD. CH3 - CH2 - CH2 - CH2 - CHO4. 2,3 - dihydroxy proanalABCDa3241b1324c4132d2413 |
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Answer» (a) 3 2 4 1 |
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| 75. |
Which one of the following is formed when methanal reacts with ammonia? (a) Tetramethylene hexamine (b) Hexamethylene tetramine (c) Formaldehyde ammonia (d) Aldimine |
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Answer» (b) Hexamethylene tetramine |
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| 76. |
Find the odd one out and give the reasons.(a) Formic acid (b) Acetic acid (c) Benzoic acid (d) Propanoic acid |
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Answer» (d) Propanoic acid It can act as reducing agent where as other acids are not act as reducing agents. |
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| 77. |
Assertion(A): Trichioro acetic acid is more acidic than acetic acid.Reason (R): Cl- is a electron withdrawing group and acidity increases with increasing number of electron withdrawing substituents on the α – carbon. (a) Both A and R are correct and R is the correct reason of A. (b) Both A and R are correct but R is not correct reason of A. (c) A is correct but R is wrong (d) A is wrong but R is correct. |
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Answer» (a) Both A and R are correct and R is the correct reason of A. |
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| 78. |
The product formed when but – 2 – ene is on ozonolysis is ……. (a) Propanone (b) Methanal (ç) Ethanal (d) Butanal |
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Answer» The product formed when but – 2 – ene is on ozonolysis is Ethanal |
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| 79. |
The products formed when propene is ozonolysed are .....(a) HCHO + CH3CHO (b) CH3CHO (c) HCOOH + CH3COOH (d) CH3COCH3 |
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Answer» (a) HCHO + CH3CHO |
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| 80. |
Find the odd one out and give the reasons.(a) Methanal (b) Ethanal (c) Phenyl metbanal (d) Prop – 2 – enal |
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Answer» (c) Phenyl metbanal It is an aromatic aldehyde where as others are aliphatic aldehydes. |
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| 81. |
Which one of the following is formed as a product when ethanal is treated with 2 equivalent of methanol? (a) 1, 1 – dimethoxy methane (b) 1 ,2 – dimethoxy ethane (c) 1, 1 – dimethoxy ethane (d) 1, 1 – diethoxy ethane |
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Answer» (c) 1, 1 – dimethoxy ethane |
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| 82. |
Which one of the following should be ozonolysed to get a mixture of ethanal and propanone?(a) Propene (b) But – 2 – ene (c) Ethylene (d) 2 – methyl – but – 2 – ene |
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Answer» (d) 2 – methyl – but – 2 – ene |
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| 83. |
Fill In the blanks.1. The aldehyde Pyridoxal function as a ………….2. p – acetylated amino phenol is used to reduce ………3. The TUPAC name of CH3 – CH = CH – CHO is ………4. The TUPAC name of CH2 = CH – CHO is ………5. The formula of mesityl oxide is ……6. The name of is ......7. But – 2 – ene gives 2 moleafethanal by ………8. …… Olefines give formaldehyde as one of the product.9. Hydration of …………. in the presence of 40% dilute sulphuric acid and 1% HgSO4 gives Ethanal.10. Calcium formate on ……… gives methanal and CaCO3 |
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Answer» 1. Coenzyme 2. Fever 3. But – 2 – enal 4. Prop – 2 – enal 5. (CH3), C = CHCOCH3 6. 3-Oxo pentanal 7. Ozonolysis 8. Terminal 9. Ethyne 10. Dry distillation |
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| 84. |
Which of the aldehyde is most reactive?(a) C6H5CHO (b) CH3CHO(c) HCHO(d) CH3 – CH2 – CHO |
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Answer» HCHO is most reactive. |
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| 85. |
What are the uses of acetaldehyde? |
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Answer» 1. Acetaldehyde is used for silvering of mirrors 2. Paraldehyde is used in medicine as a hypnotic. 3. Acetaldehyde is used in the commercial preparation of organic compounds like acetic acid, ethyl acetate etc., |
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| 86. |
Acetaldehyde does not answer (a) lodoform test (b) Lucas test (c) Benedict test (d) Tollen’s reagent test |
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Answer» (b) Lucas test |
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| 87. |
The IUPAC naine of Acetaldol is …… (a) 3 – hydroxy butanal (b) Aldol (c) 2 – hydroxy butanal (d) Butanal |
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Answer» (a) 3 – hydroxy butana |
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| 88. |
Which one of the following is formed when acetaldehyde is warmed with dilute NaOH? (a) But – 2 – enal (b) Butan – 1 – al (c) 3 – hydroxy butanal (d) 2 – hydroxybutanoic acid |
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Answer» (c) 3 – hydroxy butanal |
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| 89. |
Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is …… (a) Grignard reagent (b) Sn / HCl (c) hydrazine in presence of slightly acidic solution(d) hydrocyanic acid |
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Answer» (c) hydrazine in presence of slightly acidic solution |
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| 90. |
The formation of cyanohydrin from acetone is an example of ………(a) nucleophilic substitution (b) electrophilic substitution (c) electrophilic addition (d) Nucleophilic addition |
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Answer» (d) Nucleophilic addition |
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| 91. |
Which one of the following is formed when acetylene is hydrolysed in the presence of HgSO4 and H2SO4 ? (a) Ethanal (b) Ethylene (c) Ethane(d) Ethanol |
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Answer» Ethanol is hydrolysed in the presence of HgSO4 and H2SO4. |
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| 92. |
The reaction of benzaldehyde with 50% NaOH is called …… (a) Benzoin condensation (b) Claisen – schmidt reaction (c) Perkin’s reaction (d) Cannizaro reaction |
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Answer» (d) Cannizaro reaction |
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| 93. |
Which one of the following undergoes reaction with 50% NaOH solution to give the corresponding alcohol and acid?(a) Butanal (b) Phenyl methanal (c) Phenol (d) Ethanal |
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Answer» (b) Phenyl methanal |
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| 94. |
Hexa methylene tetramine is used as …………(a) analgesic (b) antipyretic (c) Urinary antiseptic (d) all of these |
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Answer» (c) Urinary antiseptic |
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| 95. |
Which one of the following is used to convert acetyl chloride to acetone?(a) CdCl2 (b) CrO2CI2 (c) Cu2CI2 (d) NaCl |
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Answer» CdCl2 is used to convert acetyl chloride to acetone |
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| 96. |
Account for the following 1. Cl – CH2COOH is a stronger acid than CH3COOH 2. Carboxylic acids do not give reactions of carbonyl group. |
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Answer» 1. MonochLoroacetic acid is comparatively stronger acid than acetic acid. This is due to – Cl as a – I group 2. Carboxylic acids do not give reactions of carbonyl group because the lone pair of electrons on the oxygen attached to hydrogen in the – COOH group are involved in resonance, which makes the carbon less electrophilic. |
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| 97. |
The product formed when Benzoyl chloride reacts with benzene is ……(a) Benzyl benzoate (b) Benzophenone (c) Benzyl chloride (d) Benzyl alcohol |
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Answer» (b) Benzophenone |
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| 98. |
What are the uses of Benzaldehyde? |
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Answer» 1. as a flavoring agent 2. in perfumes 3. in dye intermediates 4. as starting material for the synthesis of several other organic compounds like cinnamaldehyde, cinnamic acid, benzoyl chloride etc. |
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| 99. |
Which of the followìng will not give halo form test? (a) Ethanal (b) Ethanol (c) Propan – 2 – one (d) Pentan – 3 – one |
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Answer» (d) Pentan – 3 – one |
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| 100. |
The reagent used to distinguish between acetaldehyde and benzaldehyde is ….. (a) Tollens reagent (b) Fehling’s solution (c) 2, 4 – dinitrophenyl hydrazine (d) semicarbazide |
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Answer» (b) Fehling’s solution |
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