Question

which of the following purely forms ionic compounds only
a (nh4)cl
b cl2o
c pbr3
d ticl4
question 4 of 4

Explanation:

Step1: Recall ionic compound definition

Ionic compounds are formed by the transfer of electrons between a metal (or a poly - atomic cation) and a non - metal (or poly - atomic anion).

Step2: Analyze option A

$(NH_4)Cl$ consists of the ammonium cation $NH_4^+$ and the chloride anion $Cl^-$. It is an ionic compound.

Step3: Analyze option B

$Cl_2O$ is a covalent compound as it is formed by the sharing of electrons between non - metal atoms (chlorine and oxygen).

Step4: Analyze option C

$PBr_3$ is a covalent compound since both phosphorus and bromine are non - metals and form bonds by sharing electrons.

Step5: Analyze option D

$TiCl_4$ has a more covalent character due to the relatively high charge and small size of the titanium(IV) ion, and it is formed by sharing of electrons between titanium and chlorine to some extent.

Answer:

A. $(NH_4)Cl$