Describe the Dewar's method of separation of noble gases.

Describe two methods for the preparation of acetone.

Assertion : Charcoal is used in separation of noble gases. Reason : Charcoal has porous structure.

Define molecular mass. Describe three methods for the determination of molecular masses of gases.

Describe the methods of saving ozone layer.

Describe the important methods for the preparation of alkenes.

Describe the important methods for the preparation of alkynes.

Describe the methods used to prepare oxides.

Clathrate compounds are used for transportation of noble gases.

On what priciple are the following methods of separation based? Give on example of a mixture of the methods mentioned in which they are used. By using a separating funnel

On what priciple are the following methods of separation based? Give on example of a mixture of the methods mentioned in which they are used. Magnetic separations.