Chapter 21, Problem 21.15CP

Interpretation Introduction

Interpretation:

Whether the given elements are found as carbonates, oxides, sulfides or in uncombined form has to be explained.

Explanation of Solution

Given,

Figure 1

• In periodic table, the element C is in group $\text{IIA}$ and the element is strontium with two valance electrons which can be easily removed to attain $+2$ oxidation state.
• Thus, strontium exist as strontium carbonate.
• The element A belongs to first row of transition elements and the element is vanadium.  Its common oxidation state are $+5,+4,+3,+2$.  Therefore, vanadium exists as oxides and sulfides.
• The element D belongs to transition elements and the element is platinum which exist as uncombined form.
• The element B belongs to first row of transition elements and the element is zinc.  Its common oxidation state is $+2$.  Therefore, zinc exists as oxides and sulfides.