What characteristic is shared by most simple polyatomic ions? a) they are anions. b) they are bonded ionically. c) they are cations. d) they have positive charges.

Answer : The correct answer is option A : They are anions.

Explanation :

Polyatomic ions are the ions that contain 2 or more different atoms that are covalently bonded to each other.

Polyatomic ions could be positively charged ( Cations) or negatively charged (anions).

But if we take a look at the most commonly known polyatomic ions, we will see that almost all of them are anions .

Some examples are given below.

Nitrate : NO₃⁻

Sulfate : SO₄²⁻

Hydroxide : OH⁻

Phosphate : PO₄³⁻

Chlorate : ClO₃⁻

The only positively charged polyatomic ion that is most common is NH₄⁺ ion.

Hence we can say that, the characteristic that is shared by most simple polyatomic ions is that they are anions.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.