Important questions of Is matter around us pure class 9
Most Important questions of Is matter around us pure class 9
- Differentiate between mixtures and compound by giving appropriate examples?
- Write a method to separate a mixture of salt and ammonium chloride?
- What is crystallization? Where is it used? Why is this better than simple evaporation technique?
- What is chromatography? What are its various applications and underline the basic principle involved?
- A solution of H2SO4 acid is labeled is 95%. What is the mass of this that must be diluted with water to get 5L of solution containing 10g of H2SO4 per litre?
- Which of the following solution scatter light? (a) colloidal solution (b) suspension (c) both (d) none
- Which of the following methods would you use to separate cream from milk?(a) fractional distillation (b) distillation (c) centrifugation (d) filtration
- Cooking of food and digestion of food:-(a) are both physical processes (b) are both chemical processes (c) cooking is physical whereas digestion is chemical (d) cooking is chemical whereas digestion physical
- Mercury and Bromine are both (a) liquid at room temperature (b) solid at room temperature (c) gases at room temperature (d) both (a) and (b)
- What is a mixture? What are its various types?
- Define solute, solvent and solution?
- What is a solution? What are the properties of solution?
- Differentiate between elements and compounds.
- Write a method to separate different gases from air.
- What is a colloid? What are its various properties?
- A solution contains 60g of NaCl in 400g of water. Calculate the concentration in term of mass by mass percentage of the solution.
- Differentiate between metals and non metal based upon the various properties that they show.
- What is distillation and fractional distillation? What is the basic property that separates the two methods?
