COMEDK 2024 Morning Shift | Aldehyde and Ketone Question 5 | Chemistry

Which one of the following statements is incorrect regarding acetal and ketal formation when Propanal and Propanone are separately reacted with Ethanol in presence of anhydrous $$\mathrm{HCl}$$ gas.

Anhydrous $$\mathrm{HCl}$$ gas decreases the electrophilicity of the Carbonyl Carbon.

Rate of formation of acetal is greater than that of ketal formation.

Propanal and Ethanol should be taken in the approximate ratio of $$1: 2$$ for acetal formation.

Both Propanal and Propanone undergo Nucleophilic addition reaction during this process.

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

-0

A Carbonyl compound $$\mathrm{X}$$ when reacted with Methyl magnesium bromide followed by hydrolysis gave product $$\mathrm{Y}$$. When $$\mathrm{Y}$$ is heated with $$\mathrm{Cu}$$ at $$573 \mathrm{~K}$$, it gave $$\mathrm{Z}$$ (2- Methylbut-2-ene) as one of the products. Identify $$\mathrm{X}$$.

Pentan-2-one

Butanal

Butanone

Pentan-3-one

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

-0

Identify the Reagents I and II to be used in the course of the given reactions.

COMEDK 2024 Morning Shift Chemistry - Aldehyde and Ketone Question 6 English

$$ \text { Reagent I: DIBAL- } \mathrm{H} / \mathrm{H}_2 \mathrm{O} \quad \text { Reagent II: conc. } \mathrm{KOH} / \text { heat } $$

$$ \text { Reagent I: } \mathrm{Zn} / \mathrm{Hg} \text { in conc. } \mathrm{HCl} \quad \text { Reagent II: }\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+} $$

$$ \text { Reagent I: } \mathrm{NH}_2 \mathrm{NH}_2 / \mathrm{KOH} \quad \text { Reagent II: } \mathrm{Cr}_2 \mathrm{O}_7{ }^{2-} / \mathrm{H}^{+} $$

$$ \text { Reagent I: } \mathrm{H}_2 / \mathrm{Pd}-\mathrm{BaSO}_4 \quad \text { Reagent II: } \mathrm{CrO}_3 /\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 $$

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