English Medium कक्षा ९ - CBSE Question Bank Solutions for Science

Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.

What is chromatography ? State its two applications.

What is chromatography ? State its two applications.

With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.

With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.

How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).

How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).

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 :