Question

(a),(b) and (c) are elements in the second short period. Oxide of (a) is ionic, that of (b) is amphoteric and of (c) of gaint molecule. (a),(b) and (c) have atomic number in the order-
A. (A)lt(B)lt(C)
B. (C)lt(B)lt(A)
C. (A)lt(B)lt(B)
D. (B)lt(A)lt(C)

Answer 1

Correct Answer - A
A,B and C are magnesium aluminium and silicon,Magnesdium forms ionic oxide,(MgO) aluminium forms amphoteric oxide,`(Al_(2)O_(3))` and silicon forms a giant molecule(SiO_(2))