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Anhydrous $ AlCl_3 $ cannot be obtained from which of the following reactions
$ AlCl_3-6H_2O \xrightarrow [] { { \triangle} } Al(OH)3 + 3HCl + 3H_2O$ Thus $AlCl_3 $ cannot be obtained by this method
Which metal burn in air at high temperature with the evolution of much heat.
Aluminium hydroxide is soluble in excess of sodium hydroxide forming the ion
When aluminium hydroxide, $ ext{Al(OH)}_3$, is dissolved in excess sodium hydroxide, it forms a soluble complex ion known as sodium aluminate, $ ext{Na[Al(OH)}_4 ext{]}$. This complex can be represented by the ion $ ext{AlO}_2^-$. Therefore, the correct answer is $ ext{AlO}_2^-$. This ion formation can be remembered as a result of the amphoteric nature of aluminium hydroxide, which allows it to react with both acids and bases.
Moissan boron is
Hydrogen gas will not produce
$ Conc.HNO_3$ _________
Aluminium reacts with concentrated nitric acid ($Conc.HNO_3$) to form a passive oxide layer on its surface, which prevents further reaction. Therefore, aluminium does not react with concentrated nitric acid.
$ Anhydrous AlCl_3 $ is obtained from
$ 2Al + 6HCl \rightarrow 2AlCl_3 + 3H_2 $
Which is true for an element & present in III group of the periodic table
$ Al \rightarrow III group \rightarrow form Al_2O_3 $
Crystalline metal can be transformed into metallic glass by
Crystalline metal can be transformed into metallic glass by very rapid cooling of the molten metal. This process, known as quenching, prevents the formation of a crystalline structure, resulting in an amorphous or glassy state.
Which metal is protected by a layer of it own oxide
Aluminium (Al) is protected by a layer of its own oxide. When exposed to air, aluminium forms a thin layer of aluminium oxide ($Al_2O_3$) on its surface, which acts as a protective barrier against further oxidation and corrosion.
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