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General Chemistry

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Moderate

Periodic Properties of Third Period Elements

CHEM-QRD2HS

Which one of the following elements of oxides represents​ amphoteric oxide in the chemical reactions shown below?

A

${ Na }_{ 2 }^{ }{ O }_{ (s) }^{ }+{ H }_{ 2 }^{ }{ O }_{ (l) }^{ }\rightarrow 2NaO{ H }_{ (aq) }^{ }$

B

${ MgO }_{ (s) }^{ }+2HCl_{ (aq) }^{ }\rightarrow \quad Mg{ Cl_{ 2 } }_{ (aq) }^{ }+{ H }_{ 2 }O_{ (l) }^{ }$

C

$2{ Al }{ _{ 2 }O_{ 3 } }_{ (s) }^{ }+{ 2NaOH }_{ (aq) }^{ }+6HCl_{ (aq) }^{ }+{ 3H }_{ 2 }O_{ (l) }^{ }\rightarrow \quad 2{ Al }{ Cl_{ 3 } }_{ (aq) }^{ }+2NaAl(OH){ _{ 4 }^{ } }_{ (aq) }+{ 3H }_{ 2 }O_{ (l) }^{ }$

D

${ Si }{ O_{ 2 } }_{ (s) }^{ }+{ 2NaOH }_{ (aq) }^{ }\rightarrow \quad 2Na_{ 2 }SiO{ _{ 3 }^{ } }_{ (aq) }+{ H }_{ 2 }O_{ (l) }^{ }$