Questions on Binary Molecular Compounds – Naming and Formulas
30 Multiple-Choice Questions: Binary Molecular Compounds – Naming and Formulas
Questions
1. What is the correct name for CO?
A) Carbon oxide
B) Monocarbon monoxide
C) Carbon monoxide
D) Carbon dioxide
E) Carbon(II) oxide
2. What is the correct formula for dinitrogen pentoxide?
A) N₂O₅
B) NO₂
C) N₅O₂
D) N₂O₃
E) N₄O₅
3. What is the correct name for SO₃?
A) Sulfur trioxide
B) Sulfite
C) Sulfur trioxide oxide
D) Sulfur(III) oxide
E) Sulfur tetraoxide
4. What is the formula for carbon tetrachloride?
A) CCl₄
B) C₂Cl₄
C) CCl₂
D) CCl₃
E) C₂Cl₂
5. What is the correct name for PCl₃?
A) Phosphorus trichloride
B) Phosphorus(III) chloride
C) Phosphor trichloride
D) Triphosphorus chloride
E) Phosphorus chloride
6. What is the formula for nitrogen dioxide?
A) NO₂
B) N₂O
C) N₂O₄
D) N₂O₂
E) NO
7. What is the correct name for N₂O?
A) Nitrogen monoxide
B) Dinitrogen oxide
C) Nitrogen(II) oxide
D) Nitric oxide
E) Dinitrogen monoxide
8. What is the formula for sulfur hexafluoride?
A) SF₆
B) S₂F₆
C) SF₄
D) S₆F
E) SF₂
9. What is the correct name for Cl₂O₇?
A) Chlorine heptoxide
B) Dichlorine heptoxide
C) Chlorine(VII) oxide
D) Chlorine oxide
E) Heptachlorine oxide
10. What is the formula for tetraphosphorus decoxide?
A) P₄O₁₀
B) P₄O₈
C) PO₁₀
D) P₁₀O₄
E) P₃O₁₀
11. What is the name of BrF₅?
A) Bromine pentafluoride
B) Pentabromine fluoride
C) Bromide pentafluoride
D) Bromine fluoride
E) Bromine fluorine
12. What is the formula for dihydrogen monoxide?
A) H₂O
B) HO
C) H₂O₂
D) H₂O₃
E) H₃O₂
13. What is the name of N₂F₂?
A) Dinitrogen fluoride
B) Nitrogen difluoride
C) Dinitrogen difluoride
D) Nitrogen tetrafluoride
E) Nitrogen(II) fluoride
14. What is the formula for iodine trichloride?
A) ICl₃
B) I₃Cl
C) ICl
D) I₂Cl₃
E) ICl₂
15. What is the name of SiO₂?
A) Silicon monoxide
B) Silicon dioxide
C) Silicium oxide
D) Silicate
E) Silicon tetroxide
16. What is the formula for disulfur decafluoride?
A) S₂F₁₀
B) SF₁₀
C) S₂F₅
D) S₁₀F₂
E) S₄F₂
17. What is the name of As₂O₃?
A) Arsenic trioxide
B) Diarsenic oxide
C) Diarsenic trioxide
D) Arsenous oxide
E) Diarsenic trioxide oxide
18. What is the formula for triboron pentahydride?
A) B₃H₅
B) B₅H₃
C) BH₅
D) B₃H₂
E) B₂H₅
19. What is the name of CBr₄?
A) Carbon tetrabromide
B) Carbon bromide
C) Carbon bromine
D) Carbon(IV) bromide
E) Tetrabromocarbon
20. What is the formula for dichlorine monoxide?
A) Cl₂O
B) ClO₂
C) Cl₂O₂
D) ClO
E) Cl₃O
21. What is the name of P₂O₅?
A) Diphosphorus pentaoxide
B) Phosphorus pentoxide
C) Diphosphorus pentoxide
D) Phosphorus pentaoxide
E) Biphosphorus oxide
22. What is the formula for silicon tetrachloride?
A) SiCl₄
B) Si₄Cl
C) Si₂Cl₄
D) SiCl₂
E) Si₄Cl₄
23. What is the name of NO?
A) Nitrogen oxide
B) Nitrogen monoxide
C) Nitric oxide
D) Nitrate
E) Nitrogen(I) oxide
24. What is the formula for xenon tetrafluoride?
A) XeF₄
B) Xe₂F₄
C) XeF₂
D) Xe₄F
E) XeF₅
25. What is the name of SeCl₂?
A) Selenium chloride
B) Selenium dichloride
C) Diselenium chloride
D) Diselenium dichloride
E) Selenium(II) chloride
26. What is the formula for carbon disulfide?
A) CS₂
B) C₂S
C) CS
D) C₂S₂
E) C₂S₃
27. What is the name of N₂O₄?
A) Dinitrogen tetraoxide
B) Nitrogen tetroxide
C) Nitrogen dioxide
D) Nitrogen(IV) oxide
E) Dinitrogen dioxide
28. What is the formula for phosphorus triiodide?
A) PI₃
B) P₃I
C) P₃I₃
D) PI₂
E) PI₄
29. What is the name of BCl₃?
A) Boron chloride
B) Boron trichloride
C) Triboron chloride
D) Trichloroboron
E) Boron(III) chloride
30. What is the formula for diboron tetrahydride?
A) B₂H₄
B) BH₄
C) B₄H₂
D) B₂H₂
E) B₄H₄
- Questions on Binary Ionic Compounds (Naming and Formulas)
- Questions on Polyatomic Ions – Naming and Formulas
- Questions on Ternary Ionic Compounds – Naming and Formulas
Answers with Explanations
1. C) Carbon monoxide – One oxygen requires “mono” prefix.
2. A) N₂O₅ – "Di" = 2 nitrogen, "penta" = 5 oxygen.
3. A) Sulfur trioxide – SO₃ → 1 sulfur, 3 oxygen.
4. A) CCl₄ – One carbon and 4 chlorine atoms.
5. A) Phosphorus trichloride – 1 P, 3 Cl → use “tri”.
6. A) NO₂ – One N, 2 O = nitrogen dioxide.
7. E) Dinitrogen monoxide – N₂O = 2 N, 1 O.
8. A) SF₆ – 1 S, 6 F → sulfur hexafluoride.
9. B) Dichlorine heptoxide – 2 Cl, 7 O.
10. A) P₄O₁₀ – 4 phosphorus, 10 oxygen atoms.
11. A) Bromine pentafluoride – 1 Br, 5 F.
12. A) H₂O – dihydrogen = 2 H, mono = 1 O.
13. C) Dinitrogen difluoride – N₂F₂.
14. A) ICl₃ – 1 I, 3 Cl → iodine trichloride.
15. B) Silicon dioxide – SiO₂.
16. A) S₂F₁₀ – di = 2 S, deca = 10 F.
17. C) Diarsenic trioxide – As₂O₃.
18. A) B₃H₅ – tri = 3 B, penta = 5 H.
19. A) Carbon tetrabromide – CBr₄.
20. A) Cl₂O – dichlorine monoxide.
21. C) Diphosphorus pentoxide – P₂O₅.
22. A) SiCl₄ – one Si, 4 Cl.
23. B) Nitrogen monoxide – NO.
24. A) XeF₄ – xenon tetrafluoride.
25. B) Selenium dichloride – SeCl₂.
26. A) CS₂ – 1 carbon, 2 sulfur atoms.
27. A) Dinitrogen tetraoxide – N₂O₄.
28. A) PI₃ – 1 phosphorus, 3 iodine atoms.
29. B) Boron trichloride – BCl₃.
30. A) B₂H₄ – 2 B, 4 H.
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