Which compound serves multiple roles as a nitrogen fertilizer, an onion-field weed killer, and a soil acidity corrector?
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Answer: D. Calcium cyanamide
Explanation
Calcium cyanamide decomposes slowly in soil to release plant-available nitrogen acting as a fertilizer. The compound exhibits toxic herbicidal properties that effectively control weeds specifically in onion fields. Alkaline hydrolysis reactions release calcium ions that help correct acidic soil conditions over time. Multifunctional agricultural chemicals reduce the number of separate field operations required by crop farmers. Calcium cyanamide is produced by reacting calcium carbide with nitrogen gas at very high temperatures. Soil conditioning agents neutralize excess hydrogen ions to restore optimal pH ranges for plant root growth.
Specialty crop farmers utilize calcium cyanamide to manage weeds, fertilize crops, and condition acidic soils. Safety equipment is required during application because calcium cyanamide dust causes severe skin and eye irritation. Integrated pest and nutrient management strategies often incorporate multi-action chemical amendments for efficiency. Urea serves as a nitrogen fertilizer but lacks the herbicidal properties needed to control onion-field weeds. Calcium ammonium nitrate provides nitrogen and neutralizes soil acidity without functioning as a selective herbicide. Ammonium sulphate supplies nitrogen and acidifies soil rather than correcting acidic soil conditions or killing weeds.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
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Answer: B. Calcium ammonium nitrate (CAN)
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Answer: C. High pressure, high reactants concentration, low temperature
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Q4. Which type of gasifier can be integrated with coal-based fertilizer facilities?
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Answer: B. Kopper-Totzek gasifier
Kopper-Totzek gasifiers operate successfully at atmospheric pressure utilizing oxygen and steam reactions. Entrained-flow technology allows the Kopper-Totzek gasifier to integrate smoothly into coal-based fertilizer plan...
Q5. Under Indian operational conditions, which hydrogen source for ammonia manufacturing proves to be the most expensive _______________?
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Answer: A. Electrolysis of water
Water electrolysis demands huge electrical energy inputs, making it the most expensive hydrogen manufacturing route. Hydrocarbon reforming processes utilize cheaper thermal energy derived from burning fossil fuels direct...
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Answer: A. Increases
Ammonium carbamate synthesis and dehydration to urea involve reversible reactions affected by system pressures. Le Chatelier principle dictates that higher operating pressures shift equilibrium toward the side with fewer...