What crop-toxic compound is generated through the thermal breakdown of urea_________________?
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Answer: B. Biurct (NH2CONH CONH2 H2O)
Explanation
Biuret is a toxic compound generated when urea fertilizers undergo excessive thermal heating. High manufacturing temperatures cause urea molecules to condense into biuret which is harmful. Excessive biuret concentrations burn foliage and inhibit normal crop growth when applied. Urea is a widely used nitrogen fertilizer supplying essential nutrients to agricultural soils. Manufacturing standards strictly limit biuret content in commercial urea fertilizers. Phytotoxicity occurs when crops absorb excessive levels of toxic biuret compounds.
Agronomists test fertilizer quality to ensure biuret levels remain safe for crop application. Foliar feeding requires low-biuret urea to prevent severe leaf scorch and crop damage. Fertilizer manufacturers monitor thermal reactors closely to prevent unwanted biuret formation. Uric acid is a nitrogenous metabolic waste product excreted by birds and reptiles. Diuret is an incorrect chemical term and not the recognized crop-toxic byproduct. Both b and c is incorrect because diuret is not a valid biuret compound.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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