Class 12 Chemistry Chapter 8 Aldehydes, Ketones and Carboxylic Acids MCQ: On this page we have given Class 12 Chemistry Chapter 8 Aldehydes, Ketones and Carboxylic Acids Multiple Choice (MCQ) Question and Answer for students of CBSE board. Students will very much helpful for this question and answer.
Aldehydes, Ketones and Carboxylic Acids Class 12 MCQ with Answers:
(1) Which one is the play an important role in biochemical processes of life?
(a) Aldehydes
(b) Ketones
(c) Carboxylic acid
(d) All of the above
Ans: (d) All of the above
(a) Vanillin
(b) Salicylaldehyde
(c) Cinnamaldehyde
(d) bemaldehyde
Ans: (b) Salicylaldehyde
(4) Which one is the simplest and most important carbonyl compounds.
(a) Aldehydes
(b) Ketones
(c) carboxylic acid
(d) Both a and b
Ans: (d) Both a and b
(5) Which one is the correct name for the following formula?
H2 C – CH – CH2 – C – H
(a) γ – Bromobutyraldehyde
(b) α – Bromobutyraldehyde
(c) β – Bromobutyraldehyde
(d) — – Bromobutyraldehyde
Ans: (c) β – Bromobutyraldehyde
(6) The simplest dimethyl ketone is called as –
(a) Phenone
(b) Acetone
(c) Acetophenone
(d) Propiophenone
Ans: (b) Acetone
(7) Which is the correct formula for Ethanal?
(8) What is the common name for methanal?
(a) Acetaldehyde
(b) Formaldehyde
(c) Acrolein
(d) Mesityl oxide
Ans: (b) Formaldehyde
(9) What is the common name for prop-2-enal?
(a) Acetaldehyde
(b) Acrolein
(c) Formaldehyde
(d) Mesityl oxide
Ans: (b) Acrolein
(10) What is the IUPAC name for valeraldehyde?
(a) Methanal
(b) Ethanal
(c) Pentanal
(d) Prop-2-enal
Ans: (c) Pentanal
(11) How much the bond angle length of > c = 0 bond?
(a) 140°
(b) 120°
(c) 150°
(d) 90°
Ans: (b) 120°
(12) Primary and secondary alcohol gives –
(a) ketones
(b) aldehydes
(c) Carboxylic acid
(d) Both a and b
Ans: (d) Both a and b
(13) Acyl chloride is hydrogenated over catalyst. Palladium on barium sulphate this reaction is called.
(a) Stephen reaction
(b) Rosenmund reaction
(c) Ozoholysis
(d) Dehydrogenation
Ans: (b) Rosenmund reaction
(19) What is the boiling point of n-butane?
(a) 281K
(b) 273K
(c) 329K
(d) 370K
Ans: (b) 273K
(20) What is the boiling point of propanal?
(a) 329K
(b) 420K
(c) 322K
(d) 281K
Ans: (c) 322K
(21) What is the molecular mass of methoxyethane?
(a) 58
(b) 60
(c) 59
(d) 55
Ans: (b) 60
(22) What is the molecular mass of acetone?
(a) 58
(b) 60
(c) 45
(d) 56
Ans: (a) 58
(23) What is the boiling point of propan-1-01?
(a) 340K
(b) 322K
(c) 370K
(d) 329K
Ans: (c) 370K
(24) Which one is the correct carbonyl derivatives for reagent name Ammonia?
(a) > C = NH
(b) > C = NH
(c) > C = NR
(d) > C = N – OH
Ans: (b) > C = NH
(25) Which one is the correct —- name for carbonyl derivative > C = N – OH?
(a) Amine
(b) Ammonia
(c) Hydroxylamine
(d) Hydrazine
Ans: (c) Hydroxylamine
(26) What is product produced from > C = N – OH carbonyl derivative?
(a) Imine
(b) Hydrazone
(c) Oxime
(d) Amine
Ans: (c) Oxime
(27) What is product produced from semicarbazide?
(a) Imine
(b) Amine
(c) Hydrazone
(d) Semicarbazone
Ans: (d) Semicarbazone
(28) Aldehydes and Ketones having at least one α-hydrogen undergoes a reaction in the presence of dilute alkali as catalyst to form β hydroxy aldehydes or β-hydroxy ketones. This is known as –
(a) Oxidation
(b) Aldol reaction
(c) Feling’s reaction
(d) Reduction
Ans: (b) Aldol reaction
(29) The aldol and ketol —- lose water to give α, β – unsaturated carbonyl compounds which are aldol condensation products and the reaction is called.
(a) Aldol condensation
(b) Ketol condensation
(c) β-condensation
(d) α-condensation
Ans: (a) Aldol condensation
(30) When aldol condensation is carried out between two different aldehydes and/or ketones it is called as
(a) Cross aldol condensation
(b) Cross ketol condensation
(c) Cross β condensation
(d) Cross α – condensation
Ans: (a) Cross aldol condensation
(31) Some higher members of aliphatic carboxylic acids know as –
(a) Carboxylic acid
(b) Fatty acid
(c) Ammonium
(d) Formic acid
Ans: (b) Fatty acid
(32) What is the common name use for HCOOH?
(a) Acetic acid
(b) Formic acid
(c) ——-
(d) Adipic acid
Ans: (b) Formic acid
(33) What is the IUPAC name used for CH3 CooH?
(a) Propanoic acid
(b) Ethanoic acid
(c) Methanoic acid
(d) Butanoic acid
Ans: (b) Ethanoic acid
(34) What is the common name used for HooC – CooH?
(a) Butyric acid
(b) Oxalic acid
(c) Glutaric acid
(d) Adipic acid
Ans: (b) Oxalic acid
(35) What is the IUPAC name used for CH3 CH2 COOH?
(a) Methanoic acid
(b) Acetic acid
(c) Propanoic acid
(d) Succine acid
Ans: (c) Propanoic acid
(36) What is the common name used for HooC (CH2)3 – CooH?
(a) Succinic acid
(b) Glutaric acid
(c) Adipic acid
(d) Malonic acid
Ans: (b) Glutaric acid
(37) What is the common name used for HOOC – (CH2)2 – COOH?
(a) Malonic acid
(b) Glutaric acid
(c) Succinic acid
(d) Adipic acid
Ans: (c) Succinic acid
(38) What is the IUPAC name used for HOOC – COOH?
(a) methanedoic acid
(b) Glutaric acid
(c) Adipic acid
(d) Ethanedioic acid
Ans: (d) Ethanedioic acid
(39) What is the common name used for PHOTO
(a) Bemoic acid
(b) Phthalic acid
(c) Adipic acid
(d) Oxalic acid
Ans: (b) Phthalic acid
(41) Which one is the less polar organic solvent?
(a) Benzone
(b) Ether
(c) Alcohol
(d) All of the above
Ans: (d) All of the above
(42) Which one is the correct equation?
(a) pKa = log Ka
(b) pKeq = log Keq
(c) pKa = – logKa
(d) pKa = – pKeq
Ans: (a) pKa = log Ka
(43) What is value of PKa of HCl?
(a) -7.0
(b) -5.0
(c) -4.0
(d) -8.0
Ans: (a) -7.0
(44) What is the value of pKa of trifluoroacetic acid?
(a) 0.19
(b) 4.12
(c) 4.76
(d) 0.23
Ans: (d) 0.23
(45) What is the value of pKa of benzoic acid?
(a) 0.2
(b) -7.0
(c) 4.76
(d) 4.19
Ans: (d) 4.19
(46) What is the value of pKa of acetic acid?
(a) 4.19
(b) 0.23
(c) 4.76
(d) -7.49
Ans: (c) 4.76
(47) What is the value of pKa of weak acids?
(a) Between 5 and 10
(b) Between 5 and 15
(c) Between 4 and 14
(d) Between 5 and 14
Ans: (b) Between 5 and 15
(48) Carboxylic acids base carbon dioxide to form hydrocarbons when their sodium salts are heated with sodalime.
This reaction is known as –
(a) Reduction
(b) Oxidation
(c) Halogenation
(d) Decarboxylation
Ans: (d) Decarboxylation
(49) What is the correct formula for thionyl chloride?
(a) SOCl3
(b) SOCl4
(c) SOCl2
(d) SOCl
Ans: (c) SOCl2
(50) What the value of pKa for 4-methoxy bemoic acid?
(a) 4.19
(b) 3.41
(c) 4.46
(d) 5.52
Ans: (c) 4.46
