Chemical Compound

Q.

$S{O}_2$ and $S{O}_3$ represents the same compound.

1. False

2. True

Q.

The correct formula of aluminium oxide is:

1. $\mathrm{AlO}$

2. ${\mathrm{AlO}}_2$

3. ${\mathrm{AlO}}_3$

4. ${\mathrm{Al}}_2{\mathrm{O}}_3$

Q.

The chemical formula of Barium chloride and Aluminum sulphate are ______ and ______ respectively.

1. 

2. and

3. 

4. 

Q.

Write the formulae of the following compounds:

Copper carbonate

Q. Calculate the total number of atoms and molecules present in 5H₂O.

Q.

What does $2H_{2}O$ represent?

1. 2 molecules of water

2. 6 atoms in total

3. 6 atoms in total or 2 molecules of water

4. 4 atoms in total or 2 molecules of water

Q.

7. Name the following compounds and also name the elements present in each of them. (You can ignore the numbers when naming these compounds.)

i. $\mathrm{FeO}$

Q.

A balanced equation has an equal number of___ of different ___in the reactants and products.

1. elements, molecules

2. molecules, atoms

3. atoms, element

4. molecules, elements

Q.

Which of these formulae is/are incorrect?

1. Ferric oxide - $F{e}_2{O}_3$

2. Ferrous oxide - $F{e}_2{O}_3$

3. Ferric sulphate - $Fe(S{O}_4{)}_3$

4. Ferrous sulphate - $FeS{O}_4$

Q. Pair the common name of compounds with their correct chemical formula.

1. NaCl
2. ${\mathrm{NaHCO}}_3$
3. Washing soda
4. Baking soda
5. ${\mathrm{Na}}_2{\mathrm{CO}}_3.10H_{2}O$
6. Comman salt

Q.

2 molecules of hydrogen and 2 molecules of chlorine react to give ___ molecules of hydrochloric acid.

1. 1

2. 2

3. 3

4. 4

Q.

What do the following formula stands for?

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

Q.

The chemical formula of Barium chloride and Alumnium sulphate are ______ and ______ respectively.

1. 

2. and

3. 

4. 

Q. Which of these formulae are incorrect?

1. Ferric oxide - $F{e}_2{O}_3$
2. Ferrous oxide - $F{e}_2{O}_3$
3. Ferric sulphate - $Fe(S{O}_4{)}_3$
4. Ferrous sulphate - $FeS{O}_4$

Q.

What is the chemical formula of ammonium chloride?

1. NH₃Cl
2. NH₄Cl
3. NHCl
4. NHCl₄

Q.

$S{O}_2$ and $S{O}_3$ represents the same compound.True/False

1. False

2. True