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An alkali metal A gives a compound B (mo...

 An alkali metal A 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 and give the reactions involved. 

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To solve the problem step by step, we will identify the alkali metal (A), the compound formed (B), and the compound (C) that results from the reaction with aluminum oxide. ### Step 1: Identify the Alkali Metal (A) - We know that alkali metals react with water to form hydroxides and hydrogen gas. The general reaction is: \[ 2A + 2H_2O \rightarrow 2AOH + H_2 \] - The hydroxide formed (AOH) has a molecular mass of 40. The molecular mass of AOH can be expressed as: ...
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