Monoatomic and Polyatomic Ions

Q.

Write the chemical formula for Zinc Hydroxide.

Q. An ion that consists of more than one atoms is known as a polyatomic ion.

1. True
2. False

Q.

The formula of iron (III) sulphate is

1. ${\mathrm{FeSO}}_4$

2. ${\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3$

3. $\mathrm{Fe}{\left({\mathrm{SO}}_4\right)}_3$

4. ${\mathrm{Fe}}_3{\mathrm{SO}}_4$

Q. A formula unit of zinc carbonate contains

1. One zinc, two carbon, and three oxygen atoms
2. Two zinc, two carbon, and two oxygen atoms
3. One zinc, one carbon, and three oxygen atoms
4. Two zinc, one carbon, and two oxygen atoms
   

Q. Select the polyatomic ions.

1. ${{\mathrm{NO}}_3}^{-}$
2. ${\mathrm{Cl}}^{-}$
3. $H_3{O}^{+}$
4. ${\mathrm{Na}}^{+}$
5. ${\mathrm{OH}}^{-}$
6. ${{\mathrm{SO}}_4}^{2-}$
7. ${{\mathrm{NH}}_4}^{+}$
8. ${\mathrm{Cu}}^{2+}$

Q. Which of the following are polyatomic ions?

1. Ammonium
2. Hydride
3. Oxide
4. Hydroxide

Q.

What is the charge of Mg in $Mg{Cl}_2$ ?

1. 2+

2. 1+

3. 4+

4. 3+

Q. Identify the monoatomic ions from the given ions

1. $A{l}^{3+}$
2. $H{}^{+}$
3. $S^{2-}$
4. $N{H}_4{}^{+}$

Q.

What does the following formula stand for?

${\mathrm{Ag}}_2\mathrm{S}$