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Topic 5: Chemical formulas and Chemical Equations

10. Mixed formula writing

1. Which formula represents nickel (II) dichromate?
1) Ni2Cr2O7 2) NiCrO7 3) NiCr2O7 4) Ni(Cr2O7)2

2. The formula for calcium cyanide is 3) Ca(CN)2 4) Ca(SCN)2
2) CaSCN2

1) CaCN2

3. The correct formula for potassium oxide is
1) PO2 2) P2O 3) KO2 4) K2O

4. Which is the correct formula for iron (II) sulfide?
1) FeS 2) FeSO3 3) Fe2S3 4) Fe2(SO4)2
Teacher Preview Copy

5. Which is a correct formula for a compound with IUPAC name of Nickel (III) hypochlorite?

3) NiClO3
2) Ni3ClO
4) Ni(ClO)3
1) NiCl3

6. The correct formula for manganese (VII) oxide will be
1) Mn7O2 2) Mg2O7 3) Mn2O7 4) Mn7O2

7. Which formula is correct for ammonium carbonate? 3) (NH4)3CO3 4) (NH4)3(CO)3

2) (NH4)2CO3

1) NH4CO3

8. Which formula is correct for antimony (V) oxide?
2) Sb2O

3) Sb2O5
1) SbO3 Teacher Preview Copy 4) Sb5O2

9. Which formula is correct for sodium hydrogen carbonate?
1) NaHCO3 2) NaHC 3) Na3HCO3 4) NaCO3
10. Which formula correctly represents chromium (VI) sulfide?
1) Cr6S2 2) Cr2S6 3) CrS3 4) Cr3S

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