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

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

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.