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6. ⇒ (MHT CET 2021 21th September Morning Shift )

Identify amphoteric oxide from following.

A. SO $_{3}$

B. Na $_{2}$ O

C. N $_{2}$ O

D. Al $_{2}$ O $_{3}$

Correct Option is (D)

SO $_{3}$ - Acidic, Na $_{2}$ O - Basic, N $_{2}$ O - Neutral, Al $_{2}$ O $_{3}$ - Amphoteric

7. ⇒ (MHT CET 2023 9th May Morning Shift )

Identify the element having general electronic configuration ${ns}^{2} {np}^{4}$ from following.

A. $Se$

B. $Br$

C. $Xe$

D. $Kr$

Correct Option is (A)

The general electronic configuration of the group 16 elements is ${ns}^{2} {np}^{4}$ . Among the given options, $Se$ is a group 16 element.

⇒Periodic Table and Periodicity