Organic compound Methane Ethane Propene Butene Pentyne Hexyne Formula CH 4 C 2 H 6 C 3 H 6 C 4 H 8 C 5 H 8 C 6 H 10 Observe the above table and answer the following question. Write the general formula of alkanes.

Alkanes have the general formula of C n H 2 n + 2 . If n is the number of carbon atoms, then 2n+2 is the number of hydrogen atoms. The examples of alkanes are methane and ethane from the table. Alkane consists of hydrogen and carbon atoms arranged in a tree structure in which all the carbon-carbon bonds are single.

Isomers are the organic compounds having same molecular formula, but different arrangements of carbon atoms or simply different structures. For example, butane can exist in two isomeric forms such as n-butane and iso-butane.

Complete the following table: Straight chain of Carbon compounds Structural formula Molecular formula Name C CH 4 Methane C - C _____ _____ Ethane C - C - C _____ C 3 H 8 _____ C - C - C - C _____ _____

Straight chain of Carbon compounds Structural formula Molecular formula Name C CH 4 Methane C - C C 2 H 6 Ethane C - C - C C 3 H 8 Propane C - C - C - C C 4 H 10 Butane Methane, ethane, propane and butane are saturated hydrocarbons containing 1 , 2 , 3 and 4 carbon atoms respectively. Saturated hydrocarbons are the simplest of the hydrocarbon species and are composed entirely of single bonds. All these hydrocarbons belong to the alkane homologous series. The general formula for alkanes is C n H 2 n + 2 . So, the chemical formula for ethane is C 2 H 6 , for propane it is C 3 H 8 and the formula for butane is C 4 H 10 .

HARD

Earn 100

Draw the ring structure of cyclopentane.

Important Questions on Organic Chemistry

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Question Image

Observe the above table and answer the following question.

Write the formula of hexyne.

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Organic compound	Methane	Ethane	Propene	Butene	Pentyne	Hexyne
Formula	${CH}_{4}$	$C_{2} H_{6}$	$C_{3} H_{6}$	$C_{4} H_{8}$	$C_{5} H_{8}$	$C_{6} H_{10}$

Observe the above table and answer the following question.

Write the general formula of alkanes.

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

What are isomers?

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Draw the structure of the compound of carbon given below.

Benzene.

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

What is the value of

H - C - H

bond angle in methane?

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Question Image

Observe the above table and answer the following question.

Mention the names of unsaturated hydrocarbons.

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

The general formula of Alkene is _____.

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Write the names, molecular formula and structural formula of first four hydrocarbons.

HARD

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Complete the following table:

Straight chain of Carbon compounds	Structural formula	Molecular formula	Name
$C$		${CH}_{4}$	Methane
$C - C$	_____	_____	Ethane
$C - C - C$	_____	$C_{3} H_{8}$	_____
$C - C - C - C$		_____	_____

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Write the name and structure of a saturated compound in which the carbon atoms are arranged in a ring. Give the number of single bonds present in this compound.

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Give the names and structural formulae of one saturated cyclic hydrocarbon and one unsaturated cyclic hydrocarbon.

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Write the molecular formula and structure of benzene.

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Which one of the following is not a straight chain hydrocarbon?

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Benzene with molecular formula,