Question

Consider the structure pictured above, including the accompanying ligand.
Which of the following CORRECTLY identifies the pictured compound by name, and identifies the bonding involved in its structure?

• A. The compound is ammonium dichromate. It contains both ionic and covalent bonds.
• B. The compound in diammonium chromate. It contains both ionic and covalent bonds.
• C. The compound is ammonium dichromate. It contains only ionic bonds.
• D. The compound is ammonium chromate. It contains ionic bond.

Answer 1

The correct option is A The compound is ammonium dichromate. It contains both ionic and covalent bonds.

From the given image, the compound is ammonium dichromate with the chemical formula ${\left({NH}_4\right)}_2{Cr}_2{O}_7$. Which have $2$ ${NH}_4^{+}$ ions and a ${Cr}_2{O}_7^{2-}$ ions.

Both the ions are bonded through ionic bond

${\left({NH}_4\right)}_2\pm {Cr}_2{O}_7^{2-}$ Ionic bond. and the bonds between $N-H$ and $Cr=O$ in Ammonium ion and ${C{r}_2{O}_7}^{-2}$ respectively, are covalent. Hence, the given compound in Ammonium dichromate with both ionic and covalent bonds.

Option A is correct.