Multi$-$valent metals are ones that:

a$.$ can exist in several different crystalline forms

b$.$ appear only in the representative metal groups

c$.$ form an ion whose charge is $2+$ or greater

d$.$ can form more than one ion, each with its own charge

An anhydrous substance is one that:

a$.$ does not contain any water of hydration

b$.$ is dissolved in its own water of hydration

c$.$ has been precipitated from an aqueous solution

d$.$ has properties of both ionic and molecular substances

Hydrogen can be used as an alternative fuel for automobiles. Classify the following chemical reaction. $2H_{2(g)}+O_{2(g)}2H_2{O}_{(g)}$

a$.$ decomposition

b$.$ single replacement

c$.$ double replacement

d$.$ formation

Which of the following compounds is classified as neutral ionic?

a$.C{l}_{2(g)}$

b$.HC{l}_{(aq)}$

c$.,NaC{l}_{(s)}$

d$.,OC{l}_{2(g)}$

The reaction of silver nitrate with zinc would be classified as a:

a$.$ formation reaction

b$.$ decomposition reaction

c$.$ double replacement reaction

d$.$ single replacement reaction