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Which of the following do not contain nitrogen element? 1. Superphosphate of lime 2. Urea 3. Indian saltpeter 4. Chille saltpeter |
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(a) |
1, 3 and 4 |
(b) |
1 and 3 |
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(c) |
1 only |
(d) |
3 only |
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Which of the following do not contain nitrogen element? 1. Superphosphate of lime 2. Urea 3. Indian saltpeter 4. Chille saltpeter |
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|||
|
(a) |
1, 3 and 4 |
(b) |
1 and 3 |
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(c) |
1 only |
(d) |
3 only |
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