1) Which of the following compounds contain(s) no covalent bond(s)? KCl,PH3,O2,B2H6,H2SO4 A) KCl,B2H6,PH3 B) KCl,H2SO4 C) KCl D) KCl,B2H6 Answer: Option CExplanation:KCl is the only ionic compund. The structure of PH3, O2, B2H6 and H2SO4 are given below