Choose the correct answer for each question.

1. What is the correct formula for diphosphorus pentoxide?

   1.   ?    P₂O₅
   2.   ?    2PO₅
   3.   ?    P₂O₄
   4.   ?    P₃O₅

2. What is the correct formula for nitrogen monoxide?

   1.   ?    NO
   2.   ?    No
   3.   ?    NO₂
   4.   ?    N₂O

3. What is the correct formula for boron trifluoride?

   1.   ?    BF₃
   2.   ?    B₃F
   3.   ?    3BF
   4.   ?    B₃F₃

4. What is the correct formula for carbon tetrabromide?

   1.   ?    CBr₄
   2.   ?    CB₄
   3.   ?    C₄Br
   4.   ?    C4Br

5. What is the correct formula for selenium hexachloride?

   1.   ?    SeCl₆
   2.   ?    SeCl₇
   3.   ?    SeCl₄
   4.   ?    SeCL₅

6. What is the correct formula for dinitrogen monoxide?

   1.   ?    N₂O
   2.   ?    NO₂
   3.   ?    N₂O₂
   4.   ?    2NO

7. What is the correct name for P₄S₃?

   1.   ?    tetraphosphorus trisulfide
   2.   ?    tetraphosphide trisulfur
   3.   ?    tetraphosphide trisulfide
   4.   ?    tetraphosphorus trisulfur

8. What is the correct name for CO?

   1.   ?    monocarbon monoxide
   2.   ?    carbon monoxide
   3.   ?    carbon monoxygen
   4.   ?    carbide monoxygen

9. What is the correct name for PBr₃?

   1.   ?    phosphorus tribromide
   2.   ?    phosphoride tribromine
   3.   ?    phosphide tribromide
   4.   ?    phosphorus tribromine

10. What is the correct name for B₂Cl₄?

    1.   ?    diboron tetrachloride
    2.   ?    diboride tetrachlorine
    3.   ?    diboron tetrachlorine
    4.   ?    boron tetrachloride

11. What is the correct name for SiS₂?

    1.   ?    silicon disulfide
    2.   ?    monosilicon disulfide
    3.   ?    silicon disulfur
    4.   ?    monosilicon disulfur

12. What is the correct name for OF₂?

    1.   ?    oxygen difluoride
    2.   ?    oxide difluoride
    3.   ?    oxgyen diflouride
    4.   ?    monoxide difluoride

13. What is the correct name for N₂O₃?

    1.   ?    dinitrogen trioxide
    2.   ?    dinitride trioxide
    3.   ?    dinitrogen trioxygen
    4.   ?    dinitride trioxygen

14. What is the correct name for SiCl₄?

    1.   ?    silicon tetrachloride
    2.   ?    silicon tetrachlorine
    3.   ?    monosilicon tetrachloride
    4.   ?    silicide tetrachloride

15. What is the correct name for CO₂?

    1.   ?    carbon dioxide
    2.   ?    carbide dioxide
    3.   ?    monocarbon dioxide
    4.   ?    carbon dioxygen