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Question
Class 10ChemistryCarbon and Its Compounds

Read the following and answer any four questions from (i) to (v).

The table given below shows six organic compounds A, B, C, D, E and F having different molecular formula:

Organic compound

Molecular formula

A

C7H16

B

C8H16

C

C4H6

D

C6H10

E

C5H10

F

C9H20

(i) Which of the following compounds belong to same homologous series?

  1. E and F
  2. B and C
  3. A and B
  4. C and D

(ii) Which of the following is the member of the same homologous series as E?

  1. D
  2. A
  3. F
  4. B

(iii) Identify the correct statements.

  1. A and F are saturated hydrocarbons while all others are unsaturated hydrocarbons.
  2. C and D belong to a homologous series having general formula CnH2n.
  3. B and E are alkynes.
  4. All the compounds have same physical and chemical properties.

(iv) Compound B is:

  1. An alkane.
  2. An alkene.
  3. An alkyne.
  4. None of these.

(v) Compound (F) has a general formula:

  1. CnH2n-2
  2. CnH2n
  3. CnH2n+4
  4. CnH2n+2

Verified Answer

(i). (d) C and D

Explanation:

A and Fare alkanes; B and E are alkenes; C and Dare alkynes.

(ii) (d) B

Explanation:

B is an alkene having general formula CnH2n the homologous series to which E belongs.

(iii) (a) A and Fare saturated hydrocarbons while all others are unsaturated hydrocarbons.

Explanation:

C and D belong to a homologous series having general formula CnH2n-2 B and E are alkenes. All the compounds have different physical and chemical properties.

(iv) (b) An alkene.

Explanation:

(B) is alkene.

(v) (d) CnH2n+2

Explanation:

(F) is an alkane.