Q58.Formaldehyde can be distinguished from acetaldehyde by the use of : (1) Schiff's reagent (2) Tollen's reagent (3) I2 /Alkali (4) Fehling's solution
What This Question Tests
This question tests the ability to differentiate between formaldehyde and acetaldehyde using common chemical tests, specifically the iodoform test which distinguishes compounds containing the CH3CO- group.
Concepts Tested
Formulas Used
R-CO-CH3 + 3I2 + 4NaOH → CHI3 + R-COONa + 3NaI + 3H2O
📚 NCERT Sections This Tests
8.4 — Write The Iupac Names Of The Following Ketones And Aldehydes. Wherever
Chemistry Class 12 · Chapter 8
8.4 Write the IUPAC names of the following ketones and aldehydes. Wherever possible, give also common names. (i) CH3CO(CH2)4CH3 (ii) CH3CH2CHBrCH2CH(CH3)CHO (iii) CH3(CH2)5CHO (iv) Ph-CH=CH-CHO CHO (v) (vi) PhCOPh
8.1 — What Is Meant By The Following Terms ? Give An Example Of The Reaction In
Chemistry Class 12 · Chapter 8
8.1 What is meant by the following terms ? Give an example of the reaction in each case. (i) Cyanohydrin (ii) Acetal (iii) Semicarbazone (iv) Aldol (v) Hemiacetal (vi) Oxime (vii) Ketal (vii) Imine (ix) 2,4-DNP-derivative (x) Schiff’s base
7.21 — Name The Reagents Used In The Following Reactions:
Chemistry Class 12 · Chapter 7
7.21 Name the reagents used in the following reactions: (i) Oxidation of a primary alcohol to carboxylic acid. (ii) Oxidation of a primary alcohol to aldehyde. (iii) Bromination of phenol to 2,4,6-tribromophenol. (iv) Benzyl alcohol to benzoic acid. (v) Dehydration of propan-2-ol to propene. (vi) Butan-2-one to butan-2-ol.
📋 Question Details
- Chapter
- Aldehydes Ketones Carboxylic Acids
- Topic
- Qualitative tests for carbonyl compounds
- Year
- 2013
- Shift
- 09 Apr Online
- Q Number
- Q58
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 12: Aldehydes, Ketones and Carboxylic Acids
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