Carbon and its compounds Worksheet-3

Carbon and its compounds Worksheet-3

Fill in the blanks:

1. Valency of carbon is _____.

2. __________ bonds are present between carbon atom in unsaturated compounds.

3. There are _____ hexagonal rings in Buckminster fullerene.

4. ______ is the general name of the class of compounds having general formula C_nH_2n+2.

5. _______ is the homologous series of the organic compounds of formula C₁₈H₃₆.

6. The name of the first member of the compound of the homologous series of general formula C_nH_2n+1Cl is ______.

7. The saturated hydrocarbons generally burn in air with blue and non-sooty flame because the percentage of carbon is _______ in them.

Multiple-Choice Question:

8. The gas evolved when graphite is burnt in air is:

(A) CO₂                 (B) CO,CO₂           (C) H₂,CO₂            (D) N₂,H₂,CO

9. The IUPAC name of C₆H₁₀ is:

(A) Hexene          (B) Hexane           (C) Hexyne           (D) None of these

10. The structural formula of eighth member of homologous series of alkenes is:

(A) C₈H₁₇              (B) C₈H₁₉              (C) C₈H₁₆              (D) C₈H₁₄

11. The difference in molecular formulae of two consecutive member of a homologous series is:

(A) CH₃                 (B) C₂H₂                (C) CH₂                 (D) C_nH_2n

12. The IUPAC name of the given compound is:

(A) Ethyl chloride                            (B) Chloropropane

(C) Chloroethane                             (D) Chlorobutane

Answer key

1. 4/ four

2. Double/triple

3. 20/ twenty

4. Alkanes/Alkane

5. Alkene

6. Methyl chloride/Chloro methane

7. Comparatively less/ less

8. (A)

9. (C)

10. (C)

11. (C)

12. (B)