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 a balanced chemical equation for the following: Complete combustion of ethane.

Ethane is used as a fuel to get energy. Complete combustion of ethane liberates carbon dioxide along with the formation of water as vapours due to high temperatures. The combustion of ethane gives heat energy. 2 C 2 H 6 + 5 O 2 → 4 CO 2 + 2 H 2 O + Heat

Write a balanced chemical equation for the following: Producing ethane from bromo-ethane using Zn / Cu couple in alcohol.

Alkyl halides are used to prepare respective alkanes. Bromo-ethane (ethyl bromide) gets reduced in the presence of Zn / Cu couple in alcohol and converts into ethane and forms hydrogen bromide. C 2 H 5 Br + 2 H → Zn / Cu couple in alcohol C 2 H 6 + HBr

State one relevant reason for the following: Soda-lime is preferred to sodium hydroxide in the laboratory preparation of methane.

In a laboratory, methane is prepared by heating the mixture of sodium acetate and soda-lime. Soda-lime is a mixture of sodium hydroxide and calcium oxide. Since, alone sodium hydroxide is a deliquescent substance that absorbs moisture from the atmosphere and becomes liquid and will affect the production of methane instead soda-lime absorbs less water and makes the production effective.

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 .

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:

Match the pairs. Group A Group B a. C 2 H 6 1. Unsaturated hydrocarbon b. C 2 H 2 2. Molecular formula of an alcohol c. CH 4 O 3. Saturated hydrocarbon d. C 3 H 6 4. Triple bond

Saturated hydrocarbons are carbon compounds with only single bonds between the carbon atoms and the valencies are satisfied by hydrogen atoms. Alkanes are saturated hydrocarbons with the general formula C n H 2 n + 2 and the compound ethane with the formula C 2 H 6 is the second member of the alkane series. Unsaturated hydrocarbons are hydrocarbons with multiple bonds such as double or triple bonds between the adjacent carbon atoms. Alkynes with the formula C n H 2 n + 2 is an example of unsaturated hydrocarbons. Ethyne C 2 H 2 ⇔ HC ≡ CH with a triple bond is the first member of the alkyne series. A group of atoms present in a molecule which is responsible for the characteristic chemical properties of an organic compound is termed as a functional group. The functional group present in CH 4 O ⇔ CH 3 OH is alcohol, - OH group. Unsaturated hydrocarbons are hydrocarbons with multiple bonds such as double or triple bonds between the adjacent carbon atoms. Alkenes with the formula C n H 2 n is an example of unsaturated hydrocarbons. Propene with the formula C 3 H 6 ⇔ H 3 C - HC = CH 2 is the second member of the alkene series. Column A Column B a. C 2 H 6 3. Saturated hydrocarbon b. C 2 H 2 4. Triple bond c. CH 4 O 2. Molecular formula of an alcohol d. C 3 H 6 1. Unsaturated hydrocarbon

EASY

Earn 100

Draw the structure of the methane molecule.

Important Questions on Organic Chemistry

HARD

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Draw the structural formula for the following:

Iso propane

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Among the following reactions, the reaction that "does not" give alkane product is

HARD

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Write a balanced chemical equation for the following:

Complete combustion of ethane.

HARD

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Write a balanced chemical equation for the following:

Producing ethane from bromo-ethane using $Zn / Cu$ couple in alcohol.

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

What is the value of

H - C - H

bond angle in methane?

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

A hydrocarbon which is a greenhouse gas is:

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

IUPAC name of lowest molecular mass alkane containing chiral carbon is

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Write a balanced chemical equation for the preparation of Methane from sodium acetate.

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

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

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

The number of covalent bonds in Pentane

(C_{5} H_{12})

HARD

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

State one relevant reason for the following:

Soda-lime is preferred to sodium hydroxide in the laboratory preparation of methane.

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

Name the saturated hydrocarbon containing two carbon atoms.

HARD

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Draw the structural formula for the following:

$2, 2$ dimethyl pentane

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Arrange the following according to the instruction given in bracket:

Ethane, methane, ethene, ethyne. (In the increasing order of the molecular weight) [ $H = 1, C = 12$ ]

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Which substance from the following is not obtained during destructive distillation of mineral coal?

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

The organic compound which undergoes substitution reaction is _____.

EASY

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Draw the structure of the compound of carbon given below.

Chloropropane.

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Draw the structures of the following.

(i) Hexanal

(ii) Propanone

MEDIUM

Science>Chemistry>Organic Chemistry>Structure of Hydrocarbon

Match the pairs.

Group A	Group B
a. $C_{2} H_{6}$	1. Unsaturated hydrocarbon
b. $C_{2} H_{2}$	2. Molecular formula of an alcohol
c. ${CH}_{4} O$	3. Saturated hydrocarbon
d. $C_{3} H_{6}$	4. Triple bond

Draw the structure of the methane molecule.

Important Questions on Organic Chemistry

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