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 .

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Earn 100

Illustrate the ring structure of cyclopentane.

Important Questions on Carbon Compounds

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

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Observe the above table and answer the following question.

Mention the names of unsaturated hydrocarbons.

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

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>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

What are isomers?

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

Draw the structure of the compound of carbon given below.

Benzene.

EASY

Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

What is the value of

H - C - H

bond angle in methane?

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

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Observe the above table and answer the following question.

Write the formula of hexyne.

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

The general formula of Alkene is _____.

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

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

HARD

Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

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>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

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>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

Draw the structure for Cyclohexene.

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Science>Chemistry>Carbon Compounds>Straight, Branched and Ring Chains of Carbon Atoms

For