question_answer

In the reaction, \[HCHO+N{{H}_{3}}\xrightarrow{{}}X,\,\,X\]is :

A)  meta-formaldehyde

B)  para-formaldehyde

C)  urotropine

D)  none of the above

Correct Answer: C

Solution :

Key Idea: Formaldehyde reacts with NH3 to form urotropine which is used as medicine to cure urinary infections. \[\underset{formaldehyde}{\mathop{6\,\,HCHO}}\,+\underset{ammonia}{\mathop{4N{{H}_{3}}}}\,\xrightarrow{{}}\underset{\begin{smallmatrix}  hexamethylene \\  tetramine\text{ }or\text{ }urotropine \end{smallmatrix}}{\mathop{{{(C{{H}_{2}})}_{6}}N{{H}_{4}}}}\,\] \[\underset{\begin{smallmatrix}  (h) \\  formaldehyde \end{smallmatrix}}{\mathop{HCHO}}\,\xrightarrow{37\,\,K}\underset{paraformaldehyde}{\mathop{{{(C{{H}_{2}}O)}_{n}}\,{{N}_{4}}}}\,\] \[\therefore \] [c] is the correct answer.