Answer
a) This formula represents covalent compound.
b) This formula represents covalent compound.
c) This formula represents ionic compound.
d) This formula represents covalent compound.
Work Step by Step
a) 'C' and 'O' both are non metal. So, the both elements share the valence electrons to form covalent bond. That's why the compound $CO_{2}$ is a covalent compound. structure: $O=C=O$
b) Hydrogen (H), sulfur (S), and oxygen (O) are all nonmetals.
Covalent compounds form when nonmetals share electrons.
In $H_2SO_4$, atoms are connected by shared electron pairs, not by ionic attraction.
c) KF is formed when one electron emitted by potassium (because it is a metal) is accepted by fluorine (because it is a non metal). So, we get $K^{+}$ when one electron is emitted from valence shell of K and $F^{-}$ when one electron is accepted on the valence shell of F. So, the compound formed is an ionic compound.
d) $CH_{5}N$ compound has elements carbon, hydrogen and nitrogen. As they all are non metal it is highly unlikely that they can form ionic bond. They all have the tendency to accept electron rather than emit electron from valence shell. So, the covalent bond is formed where they can share electron pair. Hence, the compound is a covalent compound.
