2. Which three compounds belong to the same homologous series?
a) CH₄, C₂H₆, C₃H₄
b) C₃H₆, C₄H₈, C₅H₁₀
c) C₄H₁₀, C₅H₁₀, C₆H₆
d) C₂H₂, C₃H₄, C₄H₈

3. Which formula represents a saturated compound?
a) C₂H₄
b) C₂H₂
c) C₃H₆
d) C₃H₈

4. Which substance is a binary compound?
a) potassium chlorite
b) potassium chloride
c) potassium hydroxide
d) potassium cyanide

5. The correct name of the compound with the formula PbO₂ is
a) lead (I) oxide
b) lead (II) oxide
c) lead (III) oxide
d) lead (IV) oxide

6. Which structural formula represents a member of the alkene series?
a)       c)

b)       d)

7. Which formula is the chlorite ion?
a) ClO^-
b) ClO₂^-
c) ClO₃^-
d) ClO₄^-

8. What is the formula for sodium bicarbonate?
a) Na₂CO₃
b) Na(CO₃)₂
c) NaHCO₃
d) Na₂HCO₃

9. The correct name of the acid with the formula H₂S is
a) hydrosulfuric acid
b) hydrosulfurous acid
c) sulfuric acid
d) sulfurous acid

10. The correct name of the organic compound with the formula C₃H₆ is
a) propane
b) propene
c) butane
d) butene

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