Question

The well known urinary antiseptic urotropine is formed when formaldehyde reacts with

• A. $NH _{2} OH$
• B. $NH _{3}$
• C. $NH _{2} \cdot NH _{2}$
• D. $\ce{C6H_5NH . NH2}$

Answer 1

Answer: (B)

$NH _{3}$

Answer 2

When formaldehyde reacts with ammonia, a well known urinary antiseptic urotropine (also called hexamethylene tetramine) is obtained.
$6 HCHO +4 NH _{3} \rightarrow\left( CH _{2}\right)_{6} N _{4}+6 H _{2} O$