Deck 9: Aldehydes and Ketones Reactions

Question 1

Ketones where R =R1=1 alkyl group. It can be obtained in one step by

A)Hydrolysis of esters
B)Oxidation of primary alcohol
C)Oxidation of secondary alcohol
D)Reaction of acid halide with alcohols

Answer 1

Oxidation of secondary alcohol

Question 2

The oxidation of toluene to benzaldehyde by chromyl chloride is called……..

A)Cannizzaro reaction
B)Wurtz reaction
C)Etard reaction
D)Reimer-Tiemann reaction

Answer 2

Etard reaction

Question 3

Catalyst use in the reamer tiemman reaction.

A)LiAlH₄
B)CuCl₃
C)Ni / H₂
D)Pd

Answer 3

CuCl₃

Question 4

Dry heating of calcium acetate gives

A)Acetaldehyde
B)Ethane
C)Acetic acid
D)Acetone

Question 5

Acetophenone is prepared by the reaction of which of the following in the presence of AlCl₃ catalyst……..

A)Phenol and acetic acid
B)Benzene and acetone
C)Benzene and acetyl chloride
D)Phenol and acetone

Question 6

Isopropyl alcohol on oxidation gives…….

A)Acetone
B)Acetaldehyde
C)Ether
D)Ethylene

Question 7

Which of the following compound gives a ketone with Grignard reagent .

A)Formaldehyde
B)Ethyl alcohol
C)Methyl cyanide
D)Methyl iodide

Question 8

Benzaldehyde can be prepared by oxidation of toluene by ………….

A)Acidic KMnO₄
B)K₂Cr₂ O7
C)CrO₂Cl₂
D)All of these

Question 9

CH₃ CO CH₃ can be obtained by ………..

A)Heating acetaldehyde with methanol
B)Oxidation of propyl alcohol
C)Oxidation of isopropyl alcohol
D)Reduction of propionic acid

Question 10

Propyne on hydrolysis in presence of HCl and HgSO₄ gives………….

A)Acetaldehyde
B)Acetone
C)Formaldehyde
D)None of these

Question 11

Which of the following on reaction with NH₃ gives urinary antiseptic compound.

A)HCHO
B)CH₃ CHO
C)C₆H₅ CHO
D)C₆H₅CH₃CHO

Question 12

The oxidation product of 2-propanol with hot conc. HNO₃ is ………..

A)Ethanoic acid
B)Propanone
C)Propanal
D)None of these

Question 13

Ethyne on reaction with water in the presence of HgSO₄ and H₂SO₄ gives……….

A)Acetone
B)Acetaldehyde
C)Acetic acid
D)Ethyl alcohol

Question 14

When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is………..

A)Methanoic acid
B)Ethanal
C)Methanol
D)Methanal

Question 15

Benzoin is………..

A)Compound containing an aldehyde and a ketonic group
B)? , ß -unsaturated acid
C)?-hydroxy aldehyde
D)? -hydroxy ketone

Question 16

The oxidation of benzyl chloride with lead nitrate gives……………

A)Benzyl alcohol
B)Benzoic acid
C)Benzaldehyde
D)p -chlorobenzaldehyde

Question 17

Glycerol reacts with potassium bisulphate to produce …………

A)Allyl iodide
B)Allyl sulphate
C)Acryl aldehyde
D)Glycerol trisulphate

Question 18

The reagent used in Gatterman Koch aldehyde synthesis is………..

A)Pb/ BaSO₄
B)Alkaline KMnO₄
C)Acidic KMnO₄
D)CO + HCl

Question 19

Reduction of Aldehydes and Ketones to hydrocarbon take place in the presence of ……………

A)Zn amalgam and HCl acid
B)Pb /BaSO₄
C)Anhydrous AlCl₃
D)Ni / Pt

Question 20

Reduction of CO to 2CH can be carried out with…………

A)Catalytic reduction
B)Na/ C₂ H₅ OH
C)Wolf-Kischner reduction
D)LiAlH₄

Question 21

For C₂H₅ CHO which of the following is incorrect……….

A)On oxidation it yields benzoic acid
B)It is used in perfumery
C)It is an aromatic aldehyde
D)On reduction yields phenol

Question 22

Grignard reagent on reaction with acetone forms………

A)Tertiary alcohol
B)Secondary alcohol
C)Acetic acid
D)Acetaldehyde

Question 23

Which of the following is incorrect………….

A)FeCl₃ is used in the detection of phenols
B)Fehling solution is used in the detection of glucose
C)Tollen's reagent is used in detection of unsaturation
D)NaHSO₃ is used in the detection of carbonyl compounds

Question 24

Consider the following statement Acetophenone can be prepared by…………
i. Oxidation of 1-phenylethanol
ii. Reaction of benzalthanol with methyl magnesium bromide
iii. Friedel craft's reaction of benzene with acetyl chloride
iv. Distillation of calcium benzoate

A)1 and 2
B)1 and 4
C)1 and 3
D)3 and 4

Question 25

Which of the following products is formed when benzaldehyde is treated with CH₃ MgBr and the addition product so obtained is subjected to acid hydrolysis.

A)Secondary alcohol
B)A primary alcohol
C)Phenol
D)Tert-Butyl alcohol