Question:
Urea has its major use as a solid fertilizer for nitrogen fixation. Which of the following is/are other application(s) of urea?
Urea has its major use as a solid fertilizer for nitrogen fixation. Which of the following is/are other application(s) of urea?
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Urea is a raw material for UF resins, melamine (thermal condensation), and sulfamic acid (reaction with SO3); it has no role in muriatic acid (HCl) manufacture.
Updated On: Jul 17, 2026
- manufacturing of resins and plastics.
- melamine production.
- muriatic acid production.
- sulfamic acid production.
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The Correct Option is A, B, D
Solution and Explanation
Step 1: Recall urea's role beyond fertilizer use.
Urea (NH2-CO-NH2) is also a major industrial organic-nitrogen feedstock, participating in condensation reactions with formaldehyde, with itself under heat, and with strong acids/anhydrides such as sulfur trioxide.
Step 2: Option A - resins and plastics.
Urea reacts with formaldehyde to form urea-formaldehyde (UF) resin, used as adhesives in plywood/MDF and moulding compounds. Statement A is TRUE.
Step 3: Option B - melamine.
Melamine is industrially produced by thermal condensation of urea: 6 urea gives melamine + 6 NH3 + 3 CO2. This is the dominant commercial route. Statement B is TRUE.
Step 4: Option C - muriatic acid.
Muriatic acid is industrial HCl, produced via chlor-alkali electrolysis or as a hydrocarbon-chlorination byproduct. Urea plays no role in HCl production. Statement C is FALSE.
Step 5: Option D - sulfamic acid.
Sulfamic acid (H2N-SO3H) is manufactured by reacting urea with sulfur trioxide/oleum. Statement D is TRUE.
Step 6: Conclusion.
A, B, D true; C false. \[ \boxed{A, B, D} \]
Urea (NH2-CO-NH2) is also a major industrial organic-nitrogen feedstock, participating in condensation reactions with formaldehyde, with itself under heat, and with strong acids/anhydrides such as sulfur trioxide.
Step 2: Option A - resins and plastics.
Urea reacts with formaldehyde to form urea-formaldehyde (UF) resin, used as adhesives in plywood/MDF and moulding compounds. Statement A is TRUE.
Step 3: Option B - melamine.
Melamine is industrially produced by thermal condensation of urea: 6 urea gives melamine + 6 NH3 + 3 CO2. This is the dominant commercial route. Statement B is TRUE.
Step 4: Option C - muriatic acid.
Muriatic acid is industrial HCl, produced via chlor-alkali electrolysis or as a hydrocarbon-chlorination byproduct. Urea plays no role in HCl production. Statement C is FALSE.
Step 5: Option D - sulfamic acid.
Sulfamic acid (H2N-SO3H) is manufactured by reacting urea with sulfur trioxide/oleum. Statement D is TRUE.
Step 6: Conclusion.
A, B, D true; C false. \[ \boxed{A, B, D} \]
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