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Q.
Reaction of formaldehyde and ammonia gives
WBJEEWBJEE 2011Aldehydes Ketones and Carboxylic Acids
Solution:
Formaldehyde reacts with ammonia to form hexamethylenetetramine which is used as urinary antiseptic under the name urotropine.
$6 HCHO +4 NH _{3} \longrightarrow $