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Paul Heller mixture is a combination of ammonium oxalate and potassium oxalate in the proportion of-
Select the option that correctly matches the contents of the first column with the contents of the second column. A. Elements combine in fixed ratios I. Dalton’s atomic theory B. Atoms are indivisible II. The same number of molecules C. Sulphate and oxalate ions are anions, whereas magnesium and III. Law of constant proportions D. Gram atomic mass of an element and the gram molecular mass of a compound containing. IV. Ammonium ions are cations
Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2)?
The Chemical formula of Ammonium dichromate is _____.
How is permaculture farming different from conventional chemical farming? 1. Permaculture farming discourages monocultural practices but in conventional chemical farming, monoculture practices are predominant. 2. Conventional chemical farming can cause an increase in soil salinity but the occurrence of such phenomenon is not observed in permaculture farming. 3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions. 4. Practice of mulching is very important in permaculture farming but not necessarily so conventional chemical farming Select the correct answer using the code given below.  
What is the formula for Calcium oxalate?
Consider the following statements regarding di-ammonium phosphate. 1. It’s highly soluble and thus dissolves quickly in soil to release plant-available phosphate and ammonium. 2. DAP fertiliser has to be sprinkled at the time of sowing crops like mustard and wheat. Which of the statements given above is/are correct?
Which of the following process is used to separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?
Consider the following statements: 1. Ammonia nitrogen is a measure of nitrogen present as ammonium hydroxide and ammonium salts. It will progressively decrease as sewage gets treated. 2. Organic nitrogen is the total nitrogenous matter in sewages excepting that present as ammonia nitrogen, nitrites and nitrates. It becomes ammonia in anaerobic decomposition and nitrites or nitrates in aerobic decomposition. Which of the above statements is/are correct?
Which of the following option is correct about the use of mineral acids? Sulphuric acid is used in the manufacture of fertilizers like ammonium sulfate, paints, dyes, chemicals. Nitric acid is used for making fertilizers like ammonium phosphate, explosives like TNT: Tri-Nitro Toluene, dyes, and plastics.