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Which of the following do not contain nitrogen element? 1. Super phosphate of lime 2. Urea 3. Indian saltpeter 4. Chille saltpeter (a) 1, 3 and 4 (b) 1 and 3 (c) 1 only (d) 3 only |
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Answer» The correct option is: (c) 1 only Explanation: Superphosphate of lime – Ca(H2PO4)2 Urea – CO(NH2)2 Indian saltpetre – KNO3 Chile saltpetre – NaNO3 |
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