Complete the following table which relates to the homologous series of hydrocarbons. General formula IUPAC name of the homologous series Characteristic 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

General formula IUPAC name of the homologous series Characteristic bond type IUPAC name of the first member of the series C n H 2 n - 2 A . Alkynes B . Unsaturated C . Ethyne C n H 2 n + 2 D . Alkanes E . Saturated F . Methane

Draw the structural formula for the following: 2 , 2 dimethyl pentane

2 , 2 dimethyl pentane is called neo-pentane. It is a structural isomer of heptane with a chemical formula C 7 H 16 . Its structural formula is as follows:

Draw the structural formula for the following: methanol

Methanol has hydroxyl as its main functional group and contains one carbon. Its chemical formula is CH 3 OH . Its structural formula is as follows:

Draw the structural formula for the following: Iso propane

Propane does not exist as iso-propane. The term "-iso" is used when all carbons except one form a chain and the remaining one carbon form a side alkyl chain. The chemical formula for propane is C 3 H 8 . Its structural formula is as follows:

Write the IUPAC name for the following compound: acetaldehyde

Acetaldehyde has a chemical formula CH 3 CHO . It has two carbons in its main chain and aldehyde as a functional group. The root word for two carbons is “eth-”, the primary suffix for the saturated compound is “-ane” and the secondary suffix for an aldehyde is “-al”. Hence, its IUPAC name is ethanal.

Complete the following table which relates to the homologous series of hydrocarbons. General formula IUPAC name of the homologous series Characteristic 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

General formula IUPAC name of the homologous series Characteristic bond type IUPAC name of the first member of the series C n H 2 n - 2 A . Alkynes B . Unsaturated C . Ethyne C n H 2 n + 2 D . Alkanes E . Saturated F . Methane

Give the IUPAC name for each of the following:

The IUPAC name of the given compound is but - 2 - ene or 2 - butene. There are four carbon atoms in the compound. Hence, the root word will be 'but' and a double bond is present at the second carbon atom. Hence, the suffix will be 'ene'.

Give the IUPAC name for each of the following:

The IUPAC name of the given compound is propanol. There are three carbon atoms in the compound, hence the alkane chain will be 'propane' and the functional group is alcohol, hence the suffix 'ol'.

Give the IUPAC name for each of the following:

The IUPAC name of the given compound is methanal. There is one carbon atom in the compound, hence the alkane chain will be 'methane' and the functional group is aldehyde, hence the suffix 'al'.

Give one phrase for the following statement: The tendency of an element to form chains of identical atoms.

The tendency of an element to form chains of identical atoms is called catenation. For example, Carbon has the unique ability to form bonds with other atoms of carbon, giving rise to large molecules. These compounds may have long chains of carbon, branched chains of carbon or even carbon atoms arranged in rings.

Draw the structure of the isomers of pentane.

Structural isomers are the isomers which have the same molecular formula but different structural formula on the basis of the difference in their chain structure or the position of their functional group. Pentane has a chemical formula C 5 H 10 . It shows three structural isomers. These are as follows: n-pentane iso-pentane neo-pentane

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - General Organic Chemistry>ICSE-2018>Q 6

HARD

10th ICSE

IMPORTANT

Earn 100

Write the structural formula of the two isomers of butane.

Important Questions on General Organic Chemistry

HARD

10th ICSE

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - General Organic Chemistry>ICSE-2018>Q 7

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

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