Question

Elements P and Q have atomic numbers 13 and 20 respectively. Which of their oxide is basic and which is amphoteric?

a. Oxide of P is basic while that of Q is amphoteric
b. Oxide of Q is basic while that of P is amphoteric
c. Both oxides are amphoteric
d. Both oxides are basic

Answer 1

Answer:

B

Explanation:

As atm no. 13 is aluminium

so oxide of 13 atm no. is amphoteric

while ca (atm no. 20 ) is not an amphoteric metal