Sodium hydroxide solution is added to solution X . A white precipitate is formed which is insoluble in excess of NaOH solution. Name the metal ion present in solution X.
OPTIONS
Zinc sulphate
Magnesium nitrate
Lead nitrate
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Answer:
The compounds X, A, B, C and D are aluminium, aluminium hydroxide, sodium tetrahydrozoaluminate (III), aluminium chloride and alumina.
Aluminium reacts with NaOH to form white ppt of Al(OH)
3
.
Al(OH)
3
reacts with NaOH to form Na
+
[Al(OH)
4
]
−
.
Al(OH)
3
reacts with HCL to form AlCl
3
.
When Al
2
O
3
is heated, Al
2
O
3
is obtained.
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