ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test With Answers

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ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test

Sr. # Questions Answers Choice
1 Which one of the following reagents will distinguish between C6H5CHO and C6H5COCH3 Aqueous bromine Phosphorus pentachloride 2, 4 DNPH Tollen's reagent
2 Aldelydes are the oxidation product of P-alcohols s-alcohols ter-alcohols carboxylic acids
3 The color of ppts formed by Benedirct's test is Brick red Wine red Yellow Orange
4 Which of the following compounds will react with Tollen's reagent
5 The catalytic prmoter used for the industrial preparation of acetaldehyde is PdCI<sub>2</sub> CuCI<sub>2</sub> Pd + CaCI<sub>2</sub> None of these
6 Acetone reacts with HCN to form a cyanohydrin. It is an example of Electrophilic addition Electrophilic substitution Nucleophilic addition Nucleophilic substitution
7 Ketones are prepared by the oxidation of Primary alcohol Secondary alcohol Tertiary alcohol None of these
8 Which of the following will have the highest boiling point Methanol Ethanol Propanal 2-hexanone
9 Which of the following is halo form CHBr<sub>3</sub> CHCI<sub>3</sub> CHI<sub>3</sub> All of these
10 The carbon atom of a carbonyl group is Sp hybridized Sp<sup>2</sup>hybridized Sp<sup>3</sup>hybridized None of these
11 Which is used for the reduction of aldehydes and ketones NaBH<sub>4</sub> Pt/Pd Ni All of these
12 Ketones are reduced to Primary alcohol Secondary alcohol Tertiary alcohol All of these
13 Aldehydes can be distinguished from ketones by 2,4-DNPH test NaHSO<sub>3</sub>test N<sub>2</sub>H<sub>4</sub>test Tollen's test
14 The colour of ppts formed by Fehling's test is Brick red Red Yellow Orange
15 Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution White Red Yellow None of these
16 In Tolten's best, the end product is ______ formed White ppts Red ppts Yellow ppts Silver mirror
17 Treatment with HCN followed by acid hydrolysis Oxidation of acetaldehyde followed by basic hydrolysis Treatment with HCN followed by reduction Treatment with HCN followed by oxidation
18 Distillation of calcium salts of acetic acid and formic acids gives acetaldehyde. What compound would be obtained if only calcium salt of acetic acid is distilled Formaldehyde Butyraldehyde Propionaldehyde Acetone
19 Chromic acid used to oxidize Aldehyde Ketone Both a and b None of these
20 2-chlorobutanal alfa-chlorobutanal 2-chlorobutyraldehyde alfa- chlorobutyraldehyde
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