1.

A metal X reacts with aqueous NaOH solution to form Y and a highly inflammalbe gas. Solution Y is heated and CO_(2) is poured through it. Z precipitates out and Na_(2)CO_(3) is formed. Z on the heating gives AI_(2)O_(3). Identify X,Y and Z. X Y Z

Answer»

`Al, NaAIO_(2), AI(OH)_(3)`
`AI_(2)O_(3), NaAIO_(2), AI_(2)CO_(3)`
`AI_(2)O_(3), [Na_(2)AIO_(2)]^(+) OH^(-), AI(OH)_(3)`
`AI, AI(OH)_(3) AI_(2)O_(3)`

Solution :`underset((X))(2AI) + 2NaOH + 2H_(2) O to underset((Y))(2NaSIO_(2)) + 3H_(2)`
`underset((Y))(2NaAIO_(2)) + CO_(2) + 3H_(2)O to underset((Z))(2AI(OH)_(3)) + Na_(2) CO_(3)`
`underset((Z))(2AI(OH)_(3)) to AI_(2)O_(3) + 3H_(2) O`


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