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Which of the following statements regarding aluminium is not correct ?

$\begin {array} {1 1} (A)\;\text{Aluminium is a light metal with considerable strength} \\ (B)\;\text{Aluminium is a good conductor of heat and electricity} \\ (C)\;\text{ The corrosion of the aluminium metal is prevented by the formation of a coat of aluminium oxide on its layer} \\ (D)\;\text{Aluminium dissolves in hydrochloric acid but not in concentrated sodium hydroxide}c \end {array}$

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Answer : Aluminium dissolves in hydrochloric acid but not in concentrated sodium hydroxide
Aluminium dissolves both in $\text{HCL}$ and cone. $\text{NaOH}$
$2Al+6HCl \rightarrow Al_2Cl_3+3H_2$ and $2Al+2NaOH+6H_2O \rightarrow 2Na[Al(OH)_4]+3H_2O$
Hence option (D) is the correct answer.
answered Jul 28, 2014 by thanvigandhi_1
 

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