Question

In silicon dioxide 

(a) each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms 

(b) each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms 

(c) silicon atom is bonded to two oxygen atoms 

(d) there are double bonds between silicon and oxygen atoms

Answer 1

(a) : Silicon dioxide exhibits polymorphism. It is a network solid in which each Si atom is surrounded tetrahedrally by four oxygen atoms.