Complete the following table which relates to the homologous series of hydrocarbons. General formula IUPAC name of the homologous series Characteristics of bond type IUPAC name of the first member of the series C n H 2 n - 2 (A) ........... (B) ......... (C) ............... C n H 2 n + 2 (D) ........... (E) .......... (F) ...............

Alkynes with the general formula C n H 2 n - 2 is an unsaturated homologous series in which the compounds have a triple bond between two carbons. The first member of the alkyne series is ethyne with the molecular formula C 2 H 2 . Alkanes with the general formula C n H 2 n + 2 is a saturated homologous series in which the compounds have single bonds only. The first member of the alkane series is methane with the molecular formula CH 4 . General formula IUPAC name of the homologous series Characteristics of bond type IUPAC name of the first member of the series C n H 2 n - 2 (A) Alkyne (B) Unsaturated (triple bond) (C) Ethyne C n H 2 n + 2 (D) Alkane (E) Saturated (Single bond) (F) Methane

Give a balanced chemical equation for each of the following. Action of alcoholic KOH on bromoethane.

Ethene can be prepared by heating bromoethane with alcoholic potassium hydroxide. The chemical equation for the preparation is given below: C 2 H 5 Br Bromoethane + KOH alc Potassium hydroxide → Heat H 2 C = CH 2 Ethene + KBr Potassium bromide + H 2 O Water

What is the special feature of the structure of ethyne?

Ethyne with the chemical formula C 2 H 2 is the first member of the alkyne series. Ethyne with a triple bond is an unsaturated simple alkyne with a linear structure, where two hydrogen atoms are bonded to each carbon atoms and the carbon atoms are bonded to each other with the triple bond. The structural formula of ethyne is given below.

E M B I B E

All in One - ICSE Chemistry>Chapter 10 - Hydrocarbons>CHAPTER EXERCISE>Q 25

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IMPORTANT

Earn 100

Name an unsaturated hydrocarbon formed from alcohol.

Important Questions on Hydrocarbons

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 10 - Hydrocarbons>CHAPTER EXERCISE>Q 25

Name the catalyst used for conversion of ethene to ethane.

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All in One - ICSE Chemistry>Chapter 10 - Hydrocarbons>ARCHIVES*(Last 5 Years)>Q 1

The organic compound which undergoes substitution reaction is

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 10 - Hydrocarbons>ARCHIVES*(Last 5 Years)>Q 2

Complete the following table which relates to the homologous series of hydrocarbons.

General formula	IUPAC name of the homologous series	Characteristics of bond type	IUPAC name of the first member of the series
$C_{n} H_{2 n - 2}$	(A) ...........	(B) .........	(C) ...............
$C_{n} H_{2 n + 2}$	(D) ...........	(E) ..........	(F) ...............