Name the following compound :
1) (NH4)2S __
2) Fe(OH)3 _
3) KMnO4 _
4) PbI4 __
5) Ba(OH)2 __
6) Zn(ClO4)2 _
7) CBr4_____________
8) MnPO4 _
9) SO2 _
10) CuSO4
11) PCl3 _
12) N2O4 _
13) Al2S3 _
14) HgBr2 __
15) Ca(NO2)2
16) FeCO3 _
17) Al2(SO3)3 _
18) NH4I __
19) S5N6 _
20) FeBr3 ___
The Correct Answer and Explanation is :
Here are the correct names for the given chemical compounds:
1) (NH₄)₂S – Ammonium sulfide
2) Fe(OH)₃ – Iron(III) hydroxide
3) KMnO₄ – Potassium permanganate
4) PbI₄ – Lead(IV) iodide
5) Ba(OH)₂ – Barium hydroxide
6) Zn(ClO₄)₂ – Zinc perchlorate
7) CBr₄ – Carbon tetrabromide
8) MnPO₄ – Manganese(III) phosphate
9) SO₂ – Sulfur dioxide
10) CuSO₄ – Copper(II) sulfate
11) PCl₃ – Phosphorus trichloride
12) N₂O₄ – Dinitrogen tetroxide
13) Al₂S₃ – Aluminum sulfide
14) HgBr₂ – Mercury(II) bromide
15) Ca(NO₂)₂ – Calcium nitrite
16) FeCO₃ – Iron(II) carbonate
17) Al₂(SO₃)₃ – Aluminum sulfite
18) NH₄I – Ammonium iodide
19) S₅N₆ – Pentasulfur hexanitride
20) FeBr₃ – Iron(III) bromide
Explanation:
The naming of chemical compounds follows specific rules based on the type of compound:
- Ionic Compounds (e.g., Fe(OH)₃, CuSO₄, Al₂S₃)
- Metal cations (positive ions) are named first, followed by the anion (negative ion).
- Transition metals require Roman numerals indicating their oxidation state (e.g., Iron(III) for Fe³⁺).
- Polyatomic ions (like sulfate SO₄²⁻, hydroxide OH⁻) retain their common names.
- Covalent (Molecular) Compounds (e.g., SO₂, PCl₃, N₂O₄)
- Use prefixes (mono-, di-, tri-, tetra-, penta-, hexa-) to indicate the number of atoms.
- The second element ends with “-ide” (e.g., dioxide, trichloride).
- Acidic or Polyatomic Ion-Based Compounds (e.g., KMnO₄, Zn(ClO₄)₂)
- Polyatomic ions ending in “-ate” change to “-ic acid” in acids (not relevant here but useful for understanding).
- Permanganate (MnO₄⁻) and perchlorate (ClO₄⁻) are polyatomic ions retaining their names.
By following these conventions, we can systematically name any given compound correctly.