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

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.

Name the gas evolved in the following case: Ethene undergoes hydrogenation reaction.

Ethene undergoes hydrogenation reaction to form ethane gas. In a hydrogenation reaction, two hydrogen atoms are added across the double bond of an alkene, resulting in a saturated alkane.

Name the following organic compound: The compound formed by complete chlorination of ethyne.

The compound formed by complete chlorination of ethyne is 1,1,2,2-tetrachloroethane. Ethyne is first converted into 1,2-dichloroethene which is an unsaturated compound having double bond and this compound on chlorination gives the final product. The reaction can be given as, CH ≡ CH + Cl 2 → ClCH = CHCl + Cl 2 → CHCl 2 - CHCl 2

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

Sodium acetate reacts with the strong base sodium hydroxide and calcium oxide to form methane and sodium carbonate as products. The reaction can be given as, CH 3 COONa + NaOH → CaO CH 4 + Na 2 CO 3

Write a balanced chemical equation for the preparation of Ethyne using calcium carbide.

Ethyne, also known as acetylene, is an organic compound with chemical formula C 2 H 2 . Hydrolysis of calcium carbide produces calcium hydroxide and ethyne. The reaction can be given as, CaC 2 + 2 H 2 O → Ca ( OH ) 2 + C 2 H 2

Write a balanced chemical equation for the preparation of ethene from bromoethane.

Ethene is obtained by dehydrohalogenation of bromoethane in the presence of alcoholic potassium hydroxide. Ethene is an unsaturated compound having a double bond. 2 CH 3 CH 2 Br + KOH → Alcohol C 2 H 4 + KBr + H 2 O

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 ]

The molecular masses of the compounds are: Ethane C 2 H 6 = 30 Methane CH 4 = 16 Ethene C 2 H 4 = 28 Ethyne C 2 H 2 = 26 The increasing order of molecular weight is: Methane < Ethyne < Ethene < Ethane

Name the saturated hydrocarbon containing two carbon atoms.

Ethane is a saturated hydrocarbon containing two carbon atoms. A hydrocarbon in which all the carbon-carbon bonds are single bonds are known as saturated compounds. Alkanes are saturated compounds with general formula C n H 2 n + 2 . Hence, a saturated hydrocarbon containing two carbon atoms is C 2 H 6 which is known as ethane.

Write a balanced chemical equation the following reaction: Chlorine gas is reacted with ethene.

Ethene reacts with chlorine gas to form dichloroethane. Ethene undergoes addition reaction. Law of conservation of mass is obeyed while balancing an equation. The balanced equation for the following reaction is: CH 2 = CH 2 + Cl 2 → CH 2 Cl - CH 2 Cl