Heating an aqueous solution of aluminium chloride to dryness will give
A.
$$Al\left( {OH} \right)C{l_2}$$
B.
$$A{l_2}{O_3}\,$$
C.
$$A{l_2}C{l_6}$$
D.
$$AlC{l_3}$$
Answer :
$$A{l_2}{O_3}\,$$
Solution :
The solution of aluminium chloride in water is acidic due to hydrolysis.
$$AlC{l_3} + 3{H_2}O \to Al{\left( {OH} \right)_3} + 3HCl$$
On heating it till dryness $$Al{\left( {OH} \right)_3}$$ is converted into $$A{l_2}{O_3}$$
$$Al{\left( {OH} \right)_3}\mathop \to \limits^\vartriangle A{l_2}{O_3} + 3{H_2}O$$
Releted MCQ Question on Inorganic Chemistry >> P - Block Elements
Releted Question 1
The reddish brown coloured gas formed when nitric oxide is oxidised by air is