Is Matter Around Us Pure
Is Matter Around Us Pure - NCERT Guide Science Class 9
Which separation techniques will apply for the separation of the following?
- Sodium chloride from its solution in water.
- Ammonium Chloride from a mixture containing Sodium Chloride and Ammonium Chloride.
- Small pieces of metal in the engine oil of a car.
- Different pigments from an extract of flower petals.
- Butter from curd.
- Oil from water.
- Tea leaves from tea.
- Iron pins from sand.
- Wheat grains from husk.
- Fine mud particles suspended in water.
Q2: Write the steps you would use for making tea. Use the words - solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.
Explain the following giving examples:
- Saturated solution
- Pure substance
Q4: Classify each of the following as a homogeneous or heterogeneous mixture: soda water, wood, air, soil, vinegar, filtrated tea.
Q5: How would you confirm that a colourless liquid given to you is pure water?
Which of the following materials fall in the category of a ‘pure substance’?
- Hydrochloric acid
- Calcium oxide
Which of the following will show “Tyndall effect”?
- salt solution
- copper sulphate solution
- starch solution
Classify the following into elements, compounds and mixtures.
- sugar solution
- calcium carbonate
- carbon dioxide