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....heya....swt hearts................................................................##an alkali metal gives A compound B ( molecular mass= 40) on reacting with water the compound B gives a soluble compound C on treatment with Aluminium oxide .Identify A, B, and C give the reaction involved.............................................................. FOLLOW ME ............................................................. |
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Answer» Answer: alkali METALS are sodium, potassium, lithium etc. On reacting with WATER , they give metal hydroxide.. M_k (OH)_n Hydroxide molecular mass = 17.. As molecular mass of the metal hydroxide is 40, n = 1 or 2, and correspondingly the molecular mass of metal is 23 or 6. That is metal A is either sodium or lithium. COMPOUND B is : sodium hydroxide or lithium hydroxide.. Lithium hydroxide - molecular mass is not 40.. So metal A is Sodium : Na... compound B is sodium hydroxide. aluminum oxide: Al₂ O₃ + 2 Na OH +3 H₂O ==> 2 Na Al (OH)₄
Compound C : colourless solution in water ... of compound : sodium tetra aluminate.. |
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