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 intensity of fumes increases due to the formation ofA. ammonium hydroxideB. ammonum chlorideC. ammonium sulphateD. excess of HCl vapours

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 intensity of fumes increases due to the formation ofA. ammonium hydroxideB. ammonum chlorideC. ammonium sulphateD. excess of HCl vapours
Answer» Intensity of fumes increases when `NH_(4)OH` reacts with `AlCl_(3)` due to formation of `NH_(4)Cl` . `AlCl_(3)+3NH_($)OHrarrAl(OH)_(3)+3NH_(4)Cl`.

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