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  4. Which is true for an element R present in 13th group of the periodic table?

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Q. Which is true for an element $R$ present in $13th$ group of the periodic table?

The p-Block Elements

Solution:

Group 13 elements are in +3 and +1 oxidation state. Thus they form $R_{2}O_{3}$ type oxide. Ex. $Al_{2}O_{3}$