Urotropine is a heterocyclic organic compound containing nitrogen. It is known as hexamethylenetetramine or hexamine. The molecular formula of urotropine is ( CH 2 ) 6 N 4 . It is used as a hardening substance in the formation of powdery or liquid phenolic resins or its compounds. Urotropine possess medicinal value(mandelic acid salt) as it used in the treatment of UTI (urinary tract infection) patients.Therefore, its structure can be seen as follows-

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.

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What is urotropine ?

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical 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)

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The major product of the following reaction is:

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

$(A)$ Question Image

$(B)$

$(C)$

$(D)$

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Treatment of cyclopentanone Question Image

with methyl lithium gives which of the following species?

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

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical 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:

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The major product of the following reaction is: Question Image

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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:

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical 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:

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The major product formed in the following reaction is:
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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical 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:

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical Reactions of Aldehydes and Ketones

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

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

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical 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:

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

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical Reactions of Aldehydes and Ketones

Consider the reactions:

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

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

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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:

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical Reactions of Aldehydes and Ketones

Which of the following reagents would distinguish cis-cyclopenta-1, 2-diol from the trans-isomer?

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Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Chemical Reactions of Aldehydes and Ketones

The major product of the following reaction sequence is

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What is urotropine ?

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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