Which one of the following is a mixed fertilizer? (1) Urea (2) CAN (3) Ammonium sulphate (4) NPK

Which one of the following is a mixed fertilizer? (1) Urea (2) CAN (3) Ammonium sulphate (4) NPK
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(4) NPK Explanation: A mixed fertilizer is a mixture of two or more straight fertilizers. A mixture of Nitrogen (N), Phosphorus (P) and Potassium (K) or mostly known as NPK, three elements that are critical to plant survival and growth are added to the mixed fertilizer.
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Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the

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Out of glucose, urea and dodecyl trimethyl ammonium chloride, which one forms micelles in aqueous solution above certain concentration ?

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The person who synthesized urea from ammonium cyanate was

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