39. Which is a binary ionic compound?
A) O2
C) H2sO4
B) NaF
D) Cu(NO3)2

B) NaF

Explanation:

Firstly, a binary compound consists of two ions of different elements. Unlike covalent bonding, ionic bonds consist of ions with opposite (negative and positive) charges.

Sodium Fluoride is an inorganic compound made up of sodium and fluorine. Sodium (metal) acts as the cation, while fluorine (nonmetal) acts as the anion. Thus, all knowing, Sodium Fluoride (NaF) is a binary ionic compound.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.