Carbon and its compounds Worksheet-11

Carbon and its compounds Worksheet-11

Fill in the blanks:

1. Carbon compounds usually have _____ melting and boiling points.  

2. Graphite is comparatively soft substance due to its _____ structure. 

3. The IUPAC name of given Structure is ______ CH₃ – CH₂ – CH = CH₂

4. ______ is the name of first member of homologous series of compounds of general formula C_nH_2nO₂

5. The number of carbon atoms in di-propyl ketone is ____.

6. ______ burn in air with blue flame.

Multiple-Choice Question:

7. The compound with a formula C₃H₆O₂ is :

(A) Alcohol          (B) Acid                (C) Aldehyde       (D) Ketone

8. The 9^th member of the homologous series of carboxylic acids is:

(A) C₉H₁₉COOH                                 (B) C₈H₁₇COOH

(C) C₇H₁₅COOH₃                               (D) None of these

9. The IUPAC name of first member of homologous series of ketone is:

(A) Methanone   (B) Ethanone       (C) Propanone     (D) Butanone

10. The IUPAC name of the given compound is:

(A) 3,3-dimethyl butane                 (B) 2,2-dimethyl butane

(C) 2-ethyl, 2-methyl propane       (D) Hexane

11. The IUPAC name of the given compound is:

(A) Heptyne                                      (B) Heptene

(C) Octyne                                        (D) Octane

12. The structural formula of pentanal is:

(A)                    (B)

(C)                            (D)

13. Bromine water is decolorized by cooking oil but not by butter because:

(A) Cooking is saturated, butter is unsaturated

(B) Cooking oil is unsaturated, butter is saturated

(C) Butter also decolorizes bromine water of slightly higher temperature

(D) None of these

14. The IUPAC name of the given compound is:

(A) Benzene                                      (B) Hexane

(C) Cyclohexane                               (D) Cyclopentane

Answer key:

1. Low

2. Sheet-like/Sheet like

3. But – 1 – ene or butane

4. Formic acid or Methanoic acid

5. 7/ seven

6. Alkanes/ Alkane

7. (B)

8. (B)

9. (C)

10. (B)

11. (C)

12. (D)

13. (B)

14. (C)

15. (C)