I. It is prepared by heating calcium carbide with nitrogen.
II. It decomposes into ammonia in soil.
III. It is an NPK fertilizer.
IV. It is an organic fertilizer.
Select the answer using the code given below.
This question requires evaluating the accuracy of four statements about Nitrolim (calcium cyanamide).
Analyzing Nitrolim Statements
Statement I: Preparation Method
Nitrolim is manufactured by heating calcium carbide (\(CaC_2\)) with nitrogen gas (\(N_2\)) at high temperatures (around 1000°C).
The reaction is: \(CaC_2 + N_2 \rightarrow CaCN_2 + C\). This confirms statement I is correct.
Statement II: Decomposition in Soil
When applied to moist soil, Nitrolim undergoes hydrolysis. It eventually breaks down to form ammonia (\(NH_3\)), which is then available to plants as a nitrogen source, and calcium carbonate (\(CaCO_3\)).
This process confirms statement II is correct.
Statement III: Fertilizer Type
Nitrolim primarily provides nitrogen (\(N\)). An NPK fertilizer is formulated to supply Nitrogen (\(N\)), Phosphorus (\(P\)), and Potassium (\(K\)). Since Nitrolim lacks significant amounts of \(P\) and \(K\), it is not classified as an NPK fertilizer.
Therefore, statement III is incorrect.
Statement IV: Fertilizer Classification
Nitrolim (calcium cyanamide) is produced synthetically through industrial chemical processes. It is classified as an inorganic fertilizer, not an organic one.
Therefore, statement IV is incorrect.
Conclusion
Based on the analysis, only statements I and II are correct regarding Nitrolim.
The correct option is the one that includes only statements I and II.
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