NTA Abhyas NEET2020BotanyMineral NutritionPractice
If plant material is dried and burnt in a crucible, the residue would contain
Options
- AOxides and carbonates of about ten elements
- BCarbon and phosphorus
- CNitrates and sulphates only
- DOxides and carbonates of Ca and Mg only
Correct answer
A. Oxides and carbonates of about ten elements
Step-by-step solution
If dried plant parts are heated in silica crucible at 600°C all organic substances vaporize and the remaining plant ash contains only inorganic substances or essential mineral elements. The essential elements are C, H. O, N, P, K, S, Mg, Ca, Fe, Mo, Mn, Ni, Zn, B, Cl, Cu.