Draw the structure of urotropine and write its use.

Question 51 of 66

Q. Draw the structure of urotropine and write its use.

Tamil Nadu DgeTamil Nadu HSC (DGE) Board 2019Subjective· 2mImportance★★★★★

77% · 51/66 Questions

🔒 Locked · start free trial →

You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.

Start your 14-day free trial to unlock the full solution →

Urotropine, $(CH_2)_6N_4$ , is a cage-shaped condensation product of formaldehyde and ammonia, used medicinally as a urinary antiseptic and industrially in explosive (RDX) manufacture.

Formation: Urotropine (hexamethylenetetramine) is obtained by the condensation of six molecules of formaldehyde with four molecules of ammonia, with elimination of water:

$6HCHO + 4NH_3 \rightarrow (CH_2)_6N_4 + 6H_2O$

Structure: The molecule is a symmetrical, three-dimensional cage (an adamantane-type framework). The four nitrogen atoms occupy the four corners of an (imaginary) tetrahedron, and each of the six edges of this tetrahedron is spanned by one $-CH_2-$ (methylene) bridge connecting a pair of nitrogen atoms. As a result:

Each nitrogen atom is bonded to three different $-CH_2-$ groups (using its three N-C bonds, with its lone pair left free).
Each $-CH_2-$ group bridges (is bonded to) two different nitrogen atoms.

This can be represented in condensed form as $(CH_2)_6N_4$ , a highly symmetric, cage-like, colourless crystalline solid, soluble in water.

Uses: …

Start your 14-day free trial to unlock the full solution →

Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

CBSE 2026Set ANNUAL1 mark
$Q. 40% aqueous solution of formaldehyde used to preserve biological specimens is known as ______ (fill in the blank).$
›Reveal solutionSolution

A 40% solution of formaldehyde (HCHO) in water is given the common name formalin.

…

Start your 14-day free trial to see the full solution →
CBSE 2026Set ANNUAL1 markMCQ
$Q. Which is used to preserve biological specimens ?$
(a) Acetone
(b) Acetaldehyde
(c) Ethanol
(d) Formaldehyde
›Reveal solutionSolution

A ~40% aqueous solution of formaldehyde, called formalin, is used to preserve biological specimens because it denatures and cross-links proteins, killing microbes and hardening tissue.

Formaldehyde (methanal, HCHO) reacts with the amino groups of proteins to form cross-links (via methylene bridges), which denatures the proteins and stops microbial decay. Its aqueous solution, formalin, is therefore widely used in laboratories and museums to preserve biological/anatomical specimens.

…

Start your 14-day free trial to see the full solution →
CBSE 2024Set ANNUAL1 markMCQ
$Q. The compound obtained from meadow sweet is -$
(a) Salicyl aldehyde
(b) Cinnamaldehyde
(c) Valeraldehyde
(d) Vanillin
›Reveal solutionSolution

Several common aldehydes are named for their natural plant sources; salicylaldehyde is the one obtained from the meadow-sweet plant.

NCERT lists a few naturally occurring aldehydes and the plants they are obtained from: benzaldehyde from bitter almonds, cinnamaldehyde from cinnamon, vanillin from vanilla beans, and salicylaldehyde from meadow-sweet (Spiraea/Filipendula). …

Start your 14-day free trial to see the full solution →
CBSE 2020Set ANNUAL1 mark
$Q. Write the name of solution used to preserve biological specimen.$
›Reveal solutionSolution

Formalin, a 40% aqueous solution of formaldehyde, is the standard preservative for biological specimens.

Formaldehyde (methanal, $HCHO$ ), the simplest aldehyde, is sold commercially as a 40% aqueous solution called formalin. Formaldehyde reacts with the proteins present in living tissue, cross-linking and hardening them (a process called tanning), which prevents microbial decay. Because of this property, formali …

Start your 14-day free trial to see the full solution →
CBSE 2016Set ANNUAL1 markMCQ
$Q. Formalin is$
(a) a solution of formaldehyde in alcohol
(b) liquefied formaldehyde
(c) a 40% aqueous solution of formaldehyde
(d) polymerised formaldehyde.
›Reveal solutionSolution

Formalin = ~40% w/v aqueous solution of formaldehyde (HCHO) — option (c).

Formaldehyde gas is very soluble in water; the commercially available and widely used form is an aqueous solution containing about 37–40% HCHO by mass, called formalin. It is used to preserve biological specimens and as a disinfectant/germicide. It is not an alcoho …

Start your 14-day free trial to see the full solution →

←Previous questionQ11 — (a) Write notes on cis-trans isomerism with suitable example. (b) How …→Next questionQ13 — The formation of cyanohydrin from acetone is an example of : (a) elect…

Q.Draw the structure of urotropine and write its use.

Concept understanding — Uses of Aldehydes and Ketones

Q.Draw the structure of urotropine and write its use.

🎓Unlock everything free for 14 days

Unlock everything free for 14 days