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When metal X is treated with sodium hydr...

When metal X is treated with sodium hydroxide, a white precipitate (A) is obtained, which is soluble in excess of NaOH to give soluble complex (B). Compound (A) is soluble in dilute HCl to form compound (C). The compound (A) when heated strongly gives (D), which is used to extract metal. Identify (X), (A), (B), (C) and (D). Write suitable equations to support their identities.

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The given reactions indicate that the metal X is aluminium . The reactions can be written as follows :

Thus, [X] = `Al, [A] = Al(OH)_3, [B] = Na^+ [A] (OH)_4 ]^(-)`
`[C] = AlCl_3 and [D] = Al_2 O_3`
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ICSE-SOME P-BLOCK ELEMENTS -NCERT TEXTBOOK EXERCISES (With Hints and Solutions)
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