English Medium कक्षा ९ - CBSE Question Bank Solutions for Science

How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?

How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?

What is fractional distillation ? What is the use of fractionating column in fractional distillation ?

What is fractional distillation ? What is the use of fractionating column in fractional distillation ?

Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

Explain how, nitrogen , oxygen and argon gases are separated from air.

Explain how, nitrogen , oxygen and argon gases are separated from air.

Which of the following mixture cannot be separated by using water as the solvent ?

Which of the following mixture cannot be separated by using water as the solvent ?

The dyes present in fountain pen ink can be separated by the technique of :

The dyes present in fountain pen ink can be separated by the technique of :

Pure copper sulphate can be obtained from an impure sample by the process of :

Pure copper sulphate can be obtained from an impure sample by the process of :

The material which is added to water during purification process at the water works so as to disinfect it is :

The material which is added to water during purification process at the water works so as to disinfect it is :

The technique which is used to separate particles of a solid suspended in a liquid quickly is called :

The technique which is used to separate particles of a solid suspended in a liquid quickly is called :

Naphthalene can be separated from sand :

Naphthalene can be separated from sand :