1.

Al_(2)O_(3)+N_(2)+Crarr X+CO, X+H_(2)Orarr Y+Z 'Y' is an amphoteric substance. When aqueous 'Z' is treated with AICI_(3) solution again 'Y' is formed. What are X, Y and Z?

Answer»

Solution :`X = AlN`, which on hydrolysis gives Al(OH), and AMMONIA. `Y = Al(OH)_(3) and Z=NH_(3)`
Ammonium chloride precipitates ALUMINIUM hydroxide with aqueous ammonia.
`AlCl_(3)+3NH_(4)OH rarr Al(OH)_(3)+3NH_(4)Cl`


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