Chemistry : Aldehydes, Ketones and Carboxylic Acids

Which compound among the following give/s positive iodoform test?
1. Ethanol

2. Ethanal

3. 1-butanol

4. 2-butanol

• 1,2 and 4

• 1, 3 and 4

• 1, 2 and 3

• 1 and 2

The hydroxyl compound that gives a precipitate immediately when treated with concentrated hydrochloric acid and anhydrous zinc chloride is

• 3-methyl-2-butanol

• 3-methyl-1-butanol

• 1-butanol

• 2-methyl-2-butanol

The product P in the reaction

Which set of term correctly identifies the carbohydrate show?

1.Pentose

2. Hexose

3. Aldose

4. Ketose

5. Pyranose

6. Furanose

• 1, 3 and 6

• 1, 3, and 5

• 2, 3 and 5

• 2, 3 and 6

Which of the following is a better reducing agent for the following reduction ?

RCOOH → RCH₂OH

• SnCl₂/HCl

• NaBH₄/ ether

• B₂H₆/ H₃O⁺

• H₂/ Pd

The IUPAC name of the compound is :

HOOC–CH₂–CH(COOH)–CH₂-CH₂-COOH

• 2(carboxymethyl)-pentane-1, 5-dioic acid

• 3-carboxyhexane-1, 6-dioic acid

• butane-1, 2, 4-tricarboxylic acid

• 4-carboxyhexane-1, 6-dioic acid

IUPAC name of acraldehyde is :

• but-3-en-1-al

• propenyl aldehyde

• prop-2-en-1-al

• propanal

The reagent with which both acetaldehyde and acetophenone react easily are :

• 2, 4-dinitrophenylhydrazine

• Fehling's solution

• Schiff's reagent

• Tollen's reagent

Aniline first reacts with acetyl chloride producing compound' A'. 'A' reacts with nitric acid/ sulphuric acid mixture and produces compound 'B', which hydrolyses to compound 'C'. What is the identity of 'C' ?

• Acetanilide

• p-nitroacetanilide

• p-nitroaniline

• Aniline

CH₃—CHO + HCN → A. Compound A on hydrolysis gives:

• CH₃—CH(OH)—COOH

• CH₃—CH₂—CH₂—NH₂

• CH₃—CO—COOH

• CH₃—CH₂—COOH