Which of the following statements is true regarding the typical element belonging to $1^{s t}$ group of p - block elements ?

The element forms amphoteric oxide

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The element forms a sulphate of formula

M_{2} (S O_{4})_{3}

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The element shows variable valency

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The element is a metalloid

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Solution

The correct options are
A The element forms a sulphate of formula $M_{2} (S O_{4})_{3}$
C The element forms amphoteric oxide
$3^{r d}$ period elements are called typical elements. $1^{s t}$ group of p block is $I I I A$ . The element referred is Aluminium. It forms an amphoteric oxide and being trivalent metal, it forms a sulphate of formula $M_{2} (S O_{4})_{3}$ .

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