In the reaction sequence 2 C H 3 C H O → O H - A → ∆ B ; the product B is:

C H 3 - C H 2 - C H 2 - C H 2 - O H

Consider the reactions: Identify A , X , Y and Z .

A - Ethanal, X - Ethanol, Y - But-2-enal, Z - Semicarbazone.

A - Methoxyymethane, X - Ethanoic acid, Y - Acetate ion, Z - hydrazine.

A - Methoxymethane, X - Ethanol, Y - Ethanoic acid, Z - Semicarbazide.

A - Ethanol, X - Acetaldehyde, Y - Butanone, Z - Hydrazone.

EASY

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The reduction of ketone to pinacol occurs in the presence _____ metal.

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Important Questions on Aldehydes, Ketones and Carboxylic acids

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

In the reaction sequence

2 C H_{3} C H O \overset{O H^{-}}{\to} A \overset{∆}{\to} B

; the product B is:

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The increasing order of the reactivity of the following with $L i A l H_{4}$ is:

$(A)$ Question Image

$(B)$

$(C)$

$(D)$

EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):

Question Image

Question Image

EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

In the following reaction

Aldehyde + Alcohol \overset{HCl}{\to} Acetal

$A l d e h y d e$	$A l c o h o l$
$HCHO$	$t - BuOH$
${CH}_{3} CHO$	$MeOH$

The best combination is:

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The major product B formed in the following reaction sequence is:

Question Image

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

In the following reaction sequence, the amount of

D

(in g) formed from

10

moles of acetophenone is ____.

(Atomic weights in

g m o l^{- 1} :

H = 1, C = 12, N = 14, O = 16, Br = 80 .

The yield (%) corresponding to the product in each step is given in the parenthesis)

Question Image

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

Which one of the following reactions will not result in the formation of carbon-carbon bond ?

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The major product formed in the following reaction is:
Question Image

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The test performed on compound

x

and their inferences are:

Test	Inference
$(a)$ $2, 4$ - $D N P$ test	Coloured precipitate yellow
$(b)$ Iodoform test	Yellow precipitate
$(c)$ Azo-dye test	No dye formation

Compound $' x'$ is:

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

A compound of molecular formula

C_{8} H_{8} O_{2}

reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with concentrated

NaOH

forms benzyl alcohol as one of the products. The structure of the compound is:

EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The product formed by the reaction of an aldehyde with a primary amine is:

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

An organic compound 'X' having molecular formula

C_{5} H_{10} O

yields phenyl hydrazone and gives negative response to the iodoform test and Tollen's test. It produces n-pentane on reduction. 'X' could be:

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

Consider the reactions:

Question Image

Identify $A, X, Y$ and $Z$ .

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The major product of the following reaction is

Question Image

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The correct statement about the synthesis of erythritol

(C {(C H_{2} O H)}_{4})

used in the preparation of PETN is

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The major product of the following reaction is: Question Image

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The major product 'X' formed in the following reaction is:

Question Image

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic acids>Reactions of aldehydes and ketones

The major product of the following reaction sequence is

Question Image

The reduction of ketone to pinacol occurs in the presence _____ metal.

Important Questions on Aldehydes, Ketones and Carboxylic acids

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