Aldehydes and Ketones

MDCAT • Chemistry

266 MCQs — Click "Reveal" to see the correct answer

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  1. 1
    Which of the following compound can be used for the separation of ethanal from the mixture of ethanal and ethanol
  2. 2
    Which of the following does not give aldol condensation
  3. 3
    For aldol condensation the conditions necessary
  4. 4

    Which of the following will not give addition reaction with NaHSO3:

  5. 5
    Which of the following do not give aldol condensation reactions
  6. 6
    Cannizzaro's reaction is not given by
  7. 7
    Which of the following carbonyl compounds shows rapid reaction with sodium nitroprusside
  8. 8
    Formalin is % solution of formaldehyde in water
  9. 9


    X and Y in this reaction are respectively:

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  10. 10
    Acetaldehyde gives which salt by reacting with ammonical silver nitrate
  11. 11
    Which of the following carbonyl compound can give aliphatic, saturated alcohol using NaBH4
  12. 12
    Strongest reducing agent that can reduce the Tollen's reagent is
  13. 13
    An aldehyde when boiled with Fehling solution gives brick red precipitate, red colour is due to
  14. 14

    Which one of the following set of compounds oxidize aldehydes as well as ketones

  15. 15
    Which substance does not oxidize easily
  16. 16
    For which one of the following pairs of compounds can be distinguished by means of Tollen's tests.
  17. 17
    Catalytic reduction of acetone will produce
  18. 18

    Reducing agent which attack carbonyl compound in NaBH4 is:

  19. 19
    Formation of eyanohydrin from an aldehyde is an example of
  20. 20

    the X will be?

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  21. 21
    Which of the following has maximum reactivity in nucleophilic addition reactions?
  22. 22

    What will be the product in following reaction? CH₃CH = CHCH2 COCH₃ (in presence of NaBH4) ?

  23. 23
    Addition cyanide forms of HCN to acetaldehyde in the presence of dilute mineral acid and sodium
  24. 24

    The reduction of a ketone using NaBH4 gives:

  25. 25
    Formation of yellow or orange/red precipitates with 2, 4-DNPH refers to the identification of
  26. 26
    Isobutyl alcohol on oxidation converts to a earbonyl compound A. A is
  27. 27
    Acetaldehyde is purified by which method when prepared by alcohol in laboratory
  28. 28

    ?

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  29. 29

    Which of the following is true regarding oxidation of an ethanol to an ethanal:

  30. 30
    Acidified sodium dichromate oxidizes ethanol to ethanal by producing
  31. 31
    Formaldehyde is prepared by passing and air over platinized asbestos catalyst at 300°C
  32. 32
    Formation of acetaldehyde by ethanol is known as
  33. 33
    Which of the following compound is oxidized to get methyl ethyl ketone
  34. 34
    Which of the following can be used for the oxidative preparation of aldehydes from alcohols
  35. 35
    Which one is aldehyde
  36. 36
    Which of the following is unsymmetrical ketone
  37. 37
    planar geometry is associated with
  38. 38
    Which of the following is correct statement regarding carbonyl compounds
  39. 39
    In carbonyl compounds carbonyl carbon is bonded to
  40. 40
    Carbonyl group is bonded to in ketones
  41. 41
    Strong oxidizing agents are required for oxidation of
  42. 42
    One mole of ethanol on oxidation gives
  43. 43

    Reduction of propanone with NaBH₄/H3O+ gives

  44. 44
    Base catalyst increases character of
  45. 45
    Which of the following is more reactive?
  46. 46
    Which type of reactions are given by carbonyl compound?
  47. 47

    Formalin incudes as well

  48. 48
    Dry distillation of Calcium salt of acetic acid gives
  49. 49
    is a symmetrical ketone
  50. 50

    Empirical formula for methanal is

  51. 51
    UHS MDCAT 2008

    Which of the following is used to make chloral hydrate?

  52. 52
    UHS MDCAT 2008

    Aldehydes can be synthesized by the oxidation of:

  53. 53
    UHS MDCAT 2009

    Which of the following compounds will react with Tollen's Reagent?

  54. 54
    UHS MDCAT 2009

    When acetone is heated in the presence of K2Cr2O7/H2SO4, the products formed are:

  55. 55
    UHS MDCAT 2009

    In the conversion of ethylene into acetaldehyde, cupric chloride acts as:

  56. 56
    UHS MDCAT 2010

    Brick red precipitates are formed when aldehydes react with:

  57. 57
    UHS MDCAT 2010

    Dry distillation of a mixture of calcium salts of formic acid and acetic acid results into the formation of:

  58. 58
    UHS MDCAT 2017

    In the reaction below “?” represents which one of the following products:


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  59. 59
    UHS MDCAT 2017

    Which one of the following compounds will give iodoform test on treatment with aqueous iodine?

  60. 60
    UHS MDCAT 2017

    The reactions of aldehydes and ketones with ammonia derivative G-NH3 to form compounds containing >C=N-C and water is known as _ reaction.

  61. 61
    UHS MDCAT 2017 (Reconduct)

    Both aldehyde and ketones give _:

  62. 62
    UHS MDCAT 2017 (Reconduct)

    Which reagent is responsible for the conversion of ketone to secondary alcohol:

  63. 63
    UHS MDCAT 2019

    Which of the following will give a positive test with Tollen’s reagent?

  64. 64
    UHS MDCAT 2019

    Identification tests for functional groups of organic compounds are associated with specific observations. Tollen’s reagent is an ammoniacal silver nitrate solution, which is used for the identification of a functional group X with an observation O. Identify X and O.

  65. 65
    UHS MDCAT 2023

    What is the IUPAC name of di-isopropyl ketone?

  66. 66
    UHS MDCAT 2024 NUMS MDCAT 2023

    CnH2nO is the general formula of:

  67. 67
    PMDC MDCAT 2025

    Acetaldehyde undergoes oxidation to produce acetic acid, In this reaction oxidizing agent used is

  68. 68

    Which of the following tests are given by both aldehyde and ketones?

  69. 69

    The structure and hybridization of carbonyl carbon in alkanal and alkanone is

  70. 70

    Formalin is

  71. 71
    Balochistan MDCAT 2024

    Which one of the following statements is NOT correct?

  72. 72
    Balochistan MDCAT 2024

    The IUPAC name for formaldehyde is:

  73. 73
    KPK MDCAT 2024

    Which aldehyde is more reactive towards nucleophilic addition:

  74. 74
    FMDC MDCAT 2024

    The IUPAC name of given organic compound isСН3-CH(Cl)-CH2-CH2-CHO

  75. 75
    FMDC MDCAT 2024

    The correct reactivity order of the following compounds towards nucleophile is

  76. 76
    UHS MDCAT 2024

    The blue color of Fehling solution is changed to red when warmed with an aldehyde due to the formation of which of the following?

  77. 77
    UHS MDCAT 2024

    The reaction of formaldehyde with HCN is:

  78. 78
    Sindh MDCAT 2024

    Aldehydes & ketones can be converted to alkane. This reaction is called:

  79. 79
    Sindh MDCAT 2024

    Ketones, when treated with LiAlH4, reduce to:

  80. 80
    Balochistan MDCAT 2022

    Which of the following compounds will react with Tollens reagent to give metallic silver?

  81. 81
    Balochistan MDCAT 2022

    The IUPAC name of CH3-O-C2H5 is

  82. 82
    NUMS MDCAT 2023 FMDC MDCAT 2022

    Catalytic reduction of aldehyde & Ketone forms:

  83. 83

    When aldehyde reacts with 50 % NaOH this reaction is called _.

  84. 84
    KPK MDCAT 2022

    Acetone reacts with hydrogen cyanide (HCN) to form a cyanohydrin. It is an example of?

  85. 85
    UHS MDCAT 2022

    Which of the following is incorrect?

  86. 86
    UHS MDCAT 2022

    Which of the following is the correct name of CH3CH2CH2COCH2CHO?

  87. 87
    UHS MDCAT 2022

    When Phenol reacts with formaldehyde, which of the following product is produced?

  88. 88
    Sindh MDCAT 2022

    Addition product of formaldehyde & ethyl alcohol is:

  89. 89
    Sindh MDCAT 2022

    Acetophenone is an:

  90. 90
    Sindh MDCAT 2022

    Aldehyde reacts with:

  91. 91
    Sindh MDCAT 2022

    Nylon 4.6 is:

  92. 92
    Sindh MDCAT 2022

    Acetone gives:

  93. 93
    Balochistan MDCAT 2023

    What occurs when carbonyl compounds react with HCN

  94. 94
    Balochistan MDCAT 2023

    By base-catalyzed reaction

  95. 95

    Silver Mirror with Tollens Reagent is formed by

  96. 96
    Sindh MDCAT 2023 (Retake)

    Which of the following reactions is NOT shown in ketones?

  97. 97

    Fehling's solution works on the principle of redox reaction which results in:

  98. 98

    Aldehyde and ketone on reaction with hydroxylamine form:

  99. 99

    The reduction of aldehyde and ketone is to alkanes in the presence of Zinc amalgam and HCl is called

  100. 100
    UHS MDCAT 2023

    The appearance of a silver mirror in Toliens test indicates the presence of which of the following?

  101. 101

    What is the IUPAC name of diisopropyl ketone?

  102. 102
    FMDC MDCAT 2023

    Aldehydes do not give which identification test:

  103. 103

    Aldehydes cannot be easily oxidized by:

  104. 104
    FMDC MDCAT 2023

    The function of NaOH in Adol condensation & Cannizaro's reaction respectively is:

  105. 105
    Sindh MDCAT 2023

    Which of the following produce maleic anhydride on oxidation?

  106. 106
    Sindh MDCAT 2023

    Oxidation of Toluene by KMnO4, the product is:

  107. 107
    Sindh MDCAT 2023

    Which of the following is formed when acetone is oxidized?

  108. 108
    Sindh MDCAT 2023

    Dry distillation of which of the following can be done to produce acetone?

  109. 109
    Sindh MDCAT 2023

    Which of the following is formed when form aldehyde is treated with oxidizing mixture (H2SO4+K2Cr2O7)

  110. 110

    Why does hydrogen cyanide add to propanone but not to propene?

  111. 111

    Acetaldehyde is purified by which method when prepared by alcohol in laboratory:

  112. 112

    Which of the following is correct statement regarding carbonyl compounds:

  113. 113

    For this reaction, the question mark represents:

  114. 114

    Which of the following pairs can be distinguished by Fehling's solution?

  115. 115

    Mark the incorrect statement about aldehydes and ketones.

  116. 116

    Which of the following does not give aldol condensation reactions?

  117. 117

    Which of the following carbonyl compounds does not shows rapid reaction with sodium nitroprusside

  118. 118

    Formalin is_% solution of formaldehyde in water

  119. 119

    Formation of cyanohydrin from an aldehyde is an example of:

  120. 120

    Ketones react with NaBH₄ to produce:

  121. 121

    Which one is aldehyde:

  122. 122

    In carbonyl compounds carbonyl carbon is bonded to_

  123. 123

    The reagent with which both acetaldehyde & acetone react easily is:

  124. 124

    The flavour of amyl butyrate is:

  125. 125

    Acetone is less reactive than acetaldehyde due to:

  126. 126

    lodoform test is used to check the presence of:

  127. 127

    When two moles of acetone are treated with a base, the product is?

  128. 128

    AcetaIs are:

  129. 129
    FMDC MDCAT 2018

    Methyl ketones can be characterised by performing:

  130. 130
    FMDC MDCAT 2018

    Cannizzaro's reaction is NOT given by:

  131. 131
    FMDC MDCAT 2018

    Cyanohydrins can be synthesised from ketones through:

  132. 132
    ETEA MDCAT 2017

    The oxidation of pent-2-one with nascent oxygen gives:

  133. 133
    UHS MDCAT 2017 (Reconduct)

    Identify the compound, which gives positive iodoform test:

  134. 134
    UHS MDCAT 2017 (Reconduct)

    To distinguish aldehyde from ketone which solution is used:

  135. 135
    UHS MDCAT 2017 (Reconduct)

    Reaction of alcohol with hydrogen chloride yields:

  136. 136
    UHS MDCAT 2016

    CH3COOH + PCl5 → ?

  137. 137
    UHS MDCAT 2016

    Which one of the following tests is given by both aldehydes and ketones?

  138. 138
    UHS MDCAT 2016

    Which one of the following is the IUPAC name of the structure given below?

  139. 139
    UHS MDCAT 2016

    Which one of the following is an appropriate indication of positive iodoform test?

  140. 140
    UHS MDCAT 2013

    Which of the following is the structure of ketone?

  141. 141
    UHS MDCAT 2013

    What is the structure of alcohol which on oxidation with acidified Na2Cr2O7 gives:

  142. 142
    UHS MDCAT 2013

    Which group gives a yellow precipitate of triiodomethane when warmed with alkaline aqueous iodine?

  143. 143
    UHS MDCAT 2014

    For the following reaction, what does the question mark represent?

  144. 144
    UHS MDCAT 2014

    The structural formula of the product of reaction of acetone with 2,4-dinitrophenyl hydrazine is:

  145. 145
    UHS MDCAT 2014

    A student mixed ethyl alcohol with a small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

  146. 146
    UHS MDCAT 2014

    Which one of the following compounds is a ketone?

  147. 147

    CH3CN +H2O + HCl → A + B In the reaction given above, A and B are:

  148. 148
    UHS MDCAT 2011

    Which one of the following compounds belongs to the homologous series of aldehydes?

  149. 149
    UHS MDCAT 2011

    In the below reaction, the nucleophile is:

  150. 150
    UHS MDCAT 2011

    Consider the following reaction:R―CHO + 2[Ag(NH3)2]OH → R―COONH4 + 2Ag + 2NH3 + H2O. This reaction represents one of the following tests?

  151. 151
    UHS MDCAT 2011

    An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K2Cr2O7/H2SO4 the alcohol is:

  152. 152
    UHS MDCAT 2015

    Both aldehydes and ketones are planar to the neighborhoods of the carbonyl (C=O) group. Which one of the following bonds is distorted towards the oxygen atoms?

  153. 153
    UHS MDCAT 2022 UHS MDCAT 2015

    Which one of the following is also called the silver mirror test?

  154. 154

    Ketones can be oxidized by _?

  155. 155

    Which of the following product is formed when aldol is heated?

  156. 156

    If both alkyl groups attached to the carbonyl in ketone are the same, then it is called as:

  157. 157

    In nomenclature, aldehyde group in all aldehydes are given position 1 and its position is not mentioned in the name because?

  158. 158

    Which of the following products are formed from 'Cannizzaro's reaction'?

  159. 159

    Aldol consists of which functional group?

  160. 160

    Aldol condensation takes place in the presence of _ ?

  161. 161

    Both ketones and aldehydes are present in _ ?

  162. 162

    During oxidation of unsymmetrical ketones which atom is oxidized?

  163. 163

    40% aqueous solution of formaldehyde is called:

  164. 164
    PMC Practice Test 2 2021 PMC Practice Test 5 2021

    Condensation involves which of the following reactions?

  165. 165

    Reduction of ketones produces:

  166. 166

    Which of the following product is formed when alcohol is added to acetaldehyde?

  167. 167

    In aldol condensation, nucleophile is _.

  168. 168

    Which of the following test can detect presence of both aldehydes and ketones?

  169. 169

    Which one is the correct geometry of acetal?

  170. 170

    During benedict's solution test brick red precipitates are formed due to formation of _ ?

  171. 171

    Aldehydes are obtained by the oxidation of which of the following?

  172. 172

    Which one of the following is formula of iodoform?

  173. 173

    Aldehydes can be oxidized by _.

  174. 174

    Formalin is an aqueous solution of:

  175. 175

    Which of the following compound is not reduced by NaBH4 ?

  176. 176
    PMC Practice Test 1 2021 PMC Practice Test 1 2022

    The carbonyl compound which is attached with at least one H atom at one side is called as?

  177. 177

    By the oxidation of symmetrical ketone, which of the following products are formed?

  178. 178

    In IUPAC nomenclature, ketones are named as _.

  179. 179

    The Addition of Hydrogen cyanide to Formaldehydes gives which product?

  180. 180

    Bulky ketones do not react with

  181. 181

    For aldol condensation, carbonyl system must have _.

  182. 182

    Which of the following reaction of carbonyl system is used to distinguish between carbonyl system from alcohols?

  183. 183

    The reaction of two similar carbonyl compounds to give aldol product is called as _?

  184. 184

    In the addition of sodium bisulfite to carbonyl system, which of the following is nucleophile?

  185. 185

    During base catalyzed reactions, which property of "nucleophile" increases?

  186. 186

    Which of the following undergoes Cannizzaro reaction ?

  187. 187

    Both "Ketones" and "Aldehydes" are present in _.

  188. 188

    Self-oxidation reduction reaction is also called as _?

  189. 189

    Base catalyzed reaction of carbonyl group takes place in the presence of:

  190. 190

    Formaldehyde is used in vat dyeing as?

  191. 191

    Which of the following is used in the silvering of mirrors in industries?

  192. 192

    In the normal nomenclature, the aldehyde group in all aldehydes is given position 1 and its position is not mentioned in the name because _.

  193. 193

    What is the hybridization of the carbon atom in an Aldehyde group?

  194. 194

    In acid-catalyzed nucleophilic addition reactions, which of the following property does the carbonyl system enhance?

  195. 195

    Bisulphate addition product when heated with mineral acid yield?

  196. 196

    Aldehyde reacts with Ammonia to form all of the following except:

  197. 197

    Which of the following is the function of formalin?

  198. 198

    In which of the following reagents, cupric citrate complex is formed?

  199. 199

    Formaldehyde polymerizes to form?

  200. 200

    On an industrial scale, which catalyst is used for the preparation of methanal?

  201. 201

    Aldehydes and ketones are _ ?

  202. 202

    Why is the oxidation of ketones not easy?

  203. 203

    Addition of ammonia and its derivative catalyze by _?

  204. 204

    Acetaldehyde oxidation will lead to formation of _.

  205. 205

    Aldol condensation takes place in the presence of _.

  206. 206

    In ketones, the carbonyl carbon is directly attached to:

  207. 207

    Ketones undergo reduction to form:

  208. 208

    Acetylene reacts with HgSO₄ and H₂SO₄ to form:

  209. 209

    Acetaldehyde reacts with a Grignard reagent (CH₃MgBr)followed by hydrolysis to form:

  210. 210

    Identify the common name of the following compound:CH₃CH₂COCH₂OH

  211. 211

    The FORMYL functional group is:

  212. 212

    Formaldehyde and Grignard's reagent produces:

  213. 213

    Formamint's composition is:

  214. 214

    Meta-formaldehyde is formed by:

  215. 215

    During preparation of Acetaldehyde from ethanol in laboratory, why acetaldehyde is distilled off quickly after formation?

  216. 216

    Reaction of Aldehydes with the Tollen's reagent results in the formation of _?

  217. 217
    PMC Practice Test 4 2021

    Distillation of calcium acetate and calcium formate produces?

  218. 218
    PMC Practice Test 4 2021

    From which of the following ketone can be prepared?

  219. 219

    Acetaldehyde in the presence of Conc.H2SO4 undergoes _ ?

  220. 220
    UHS MDCAT 2018

    Which mechanism of reactions is shown by carbonyl compounds?

  221. 221
    UHS MDCAT 2018

    Which compound will be produced by the oxidation of ethanal by acidified K2Cr2O7 ?

  222. 222

    Acetaldehyde undergoes polymerization with concentrated H2SO4 to form _.

  223. 223
    PMC Practice Test 2 2021

    Which of the following compounds give a positive silver mirror test?

  224. 224

    Which of the following will give a positive test with Tollen's reagent?

  225. 225

    Identification tests for functional groups of organic compounds are associated with specific observations. Tollen's reagent is an ammoniacal silver nitrate solution, which is used for the identification of a functional group X with an observation O. Identify X and O.

  226. 226
    UHS MDCAT 2019

    Select the reagent X from the following choices for this conversion:

  227. 227

    Which of the following is the correct IUPAC name of acetone?

  228. 228
    PMC Practice Test 4 2021

    What is the nature of Carbon present in Aldehyde is?

  229. 229

    Which of the following compound is present in camphor and menthone?

  230. 230

    Cyanohydrins, when reacted with mineral acid, produce _.

  231. 231
    PMC Practice Test 3 2021

    Which of the following centers are present in the carbonyl compounds?

  232. 232

    The electrophile in aromatic sulfonation is:

  233. 233

    Which class of the compounds is represented by the type formula ROR?

  234. 234

    Methyl ketones can be characterized by performing:

  235. 235

    Cyanohydrins can be synthesized from ketones through:

  236. 236
    NUMS MDCAT 2019

    Which of the following can be oxidized to an aldehyde?

  237. 237

    What is the color of the precipitate when Brady's reagent is used to test a benzaldehyde?

  238. 238

    A diabetic person's exhaled breath contains propanone. A student tries to test the diabetes by asking the person to bubble the reagent with his exhaled breath. Which of the following reagents would give a positive result?

  239. 239

    Carbonyl group undergoes:

  240. 240

    Hybridization of carbon in -CHO group is:

  241. 241
    NUMS MDCAT 2020

    2-Butanone on oxidation with K2Cr2O7 / H2SO4 forms:

  242. 242
    Sindh MCAT NTS 2016 SMBBMC Lyari

    The following reaction is an example of:

  243. 243

    Ketone reacts with Grignard reagent to form _ in acidic media?

  244. 244
    PMDC MDCAT 2020

    Which of the following reagent is used to separate and purify carbonyl and non carbonyl compounds?

  245. 245
    PMDC MDCAT 2020

    The common name of the following aldehyde is:

  246. 246
    Sindh MCAT NTS 2018

    Which of the following reactions is NOT shown by ketones?

  247. 247
    Sindh MCAT NTS 2011 DUHS and JSMU

    ROR is the general formula of:

  248. 248

    Which of the following will react with water?

  249. 249

    Treatment of propionaldehyde with Dil. the NaOH solution gives:

  250. 250
    Sindh MCAT NTS 2010 DUHS and JSMU Sindh MCAT NTS 2009

    The general formula for an aldehyde is:

  251. 251

    Tincture of Iodine is:

  252. 252
    UHS MDCAT 2019

    Which type of reaction takes place when a carbonyl compound is treated with a mixture of NaCN and an acid?

  253. 253

    The common name for 2-propanone is:

  254. 254

    Which of the following reaction takes place when acetone reacts with HCN ?

  255. 255
    NUMS MDCAT 2019

    What type of chemical reaction is this?CH3CHO + NH3 -> CH3CH(OH)NH2

  256. 256

    Which of the following does not give iodoform test?

  257. 257

    Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

  258. 258
    UHS MDCAT 2019

    Ketones can be made by oxidation of:

  259. 259
    UHS MDCAT 2018

    Which one of the following reagents is used to distinguish between aldehydes and ketones?

  260. 260

    Which of the following will not undergo aldol condensation?

  261. 261

    In Cannizzaro's reaction, Benzyl alcohol is obtained from?

  262. 262
    UHS MDCAT 2018

    Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution?

  263. 263

    Which of the following is more soluble in water?

  264. 264
    ETEA MDCAT 2019

    Which one is more reactive?

  265. 265

    Most common reaction showed by alkyl halide is:

  266. 266

    Nucleophilic addition reactions of carbonyl compounds can be catalyzed by_?