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describe exothermic and endothermic reactions with examples.
metals iron, aluminium, copper, gold, etc. have great industrial significants. which are their important ores? important alloys of iron, aluminium and copper and their uses.
Question: (a) Explain why metals are mostly ductile and ceramics brittle at room temperature. (b) Describe what you understand by the following terms. Use appropriate il
Draw the structures of white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why?
significance of hydrogen bond in skating
Which of the following reduces the activation energy of a chemical reaction?
name an artificial fertilizer or fertilisisers which farmer can use to increase the supply of nitrate,phosphate and potassium to their crops.what are the function of ions?
please provide tests in a tabular form
Al(C2O4)3 3-
The magnetic quantum number for valency electrons of sodium is: (1) 3 (2) 2 (3) 1 (4) 0 Ans: 0
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