An inorganic compound (A) is a Lewis acid an d light yellow in colour. It fumes in moist air. The intensity of fumes further increase when a rod dipped in `NH_(4)OH` is brough near it. The aciedic solution of the compound does not give andy precipitate on passing `H_(2)S` gas. However, it gives a white precipitate on adding `NH_(4)OH` solution in the presence of `NH_(4)Cl` and the white precipitate dissovles on adding `NaOH` in excess. The solutin formed when white precipitate is dissolved in NaOH is ofA. sodium sulphateB. sodium phosphateC. sodium chlorideD. sodium meta-aluminate.

An inorganic compound (A) is a Lewis acid an d light yellow in colour.

1.	An inorganic compound (A) is a Lewis acid an d light yellow in colour. It fumes in moist air. The intensity of fumes further increase when a rod dipped in `NH_(4)OH` is brough near it. The aciedic solution of the compound does not give andy precipitate on passing `H_(2)S` gas. However, it gives a white precipitate on adding `NH_(4)OH` solution in the presence of `NH_(4)Cl` and the white precipitate dissovles on adding `NaOH` in excess. The solutin formed when white precipitate is dissolved in NaOH is ofA. sodium sulphateB. sodium phosphateC. sodium chlorideD. sodium meta-aluminate.
Answer» The white precipitate of `Al(OH)_(3)` dissolves in excess of NaOH due to the formation of sodium metaaluminate. `Al(OH)_(3)+NaOHrarrNaAlO_(2)+2H_(2)O`

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