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9th Standard Important Questions


  what is polynomial?
(class: 9th Std )    Mathematics

  Which separation techniques will apply for the separation of the following? (a) Sodium chloride from its solution in water.(b) Ammonium Chloride from a mixture containing Sodium Chloride and Ammonium Chloride.(c) Small pieces of metal in the engine oil of a car. (d) Different pigments from an extract of flower petals.(e) Butter from curd.(f) Oil from water.(g) Tea leaves from tea.(h) Iron pins from sand.(i) Wheat grains from husk.(j) Fine mud particles suspended in water.  
(class: 9th std )    Science

  Write the steps you would use for making tea. Use the words - solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.
(class: 9th std )    Science

  Explain the following giving examples:(a) Saturated solution, (b) Pure substance, (c) Colloid, (e) Suspension.
(class: 9th std )    Science

  Classify each of the following as a homogeneous or heterogeneous mixture: soda water, wood, air, soil, vinegar, filtrated tea.  How would you confirm that a colourless liquid given to you is pure water?
(class: 9th std )    Science

  Which of the following materials fall in the category of a pure substance?(a) Ice (b) Milk (c) Iron (d) Hydrochloric acid (e) Calcium oxide (f) Mercury (g) Brick (h) Wood (i) Air.
(class: 9th std )    Science

  Which of the following will show Tyndall effect?
(class: 9th std )    Science

  Classify the following into elements, compounds and mixtures.(a) sodium (b) soil (c) sugar solution (d) silver (e) calcium carbonate (f) tin (g) silicon (h) coal (i) air (j) soap (k) methane (l) carbon dioxide (m) blood
(class: 9th std )    Science

  How is air separated from its constituents?
(class: 9th std )    Science

  How will you obtain pure copper sulphate from an impure sample?
(class: 9th std )    Science

  How can matter be classified on the basis of its chemical constitution?
(class: 9th std )    Science

  Define with example: (a) Mixture (b) Metalloid (c) Compound
(class: 9th std )    Science

  Name the separating processes for the following: (a) A solid substance dissolved in a liquid. (b) Fine insoluble particles suspended in a liquid. (c) Salt from sea water. (d) Three different coloured solid substances soluble in a mixture of solvents. (e) Two immiscible liquids. (f) Two immiscible liquids having 10OC difference in their boiling points. (g) Mixture of Nitrogen and Helium gases.   
(class: 9th std )    Science

  What should be the minimum difference in temperature between the boiling points of two miscible liquids that these can be separated by simple distillation method?
(class: 9th std )    Science

  Give two important industrial applications of fractional distillation.
(class: 9th std )    Science

  What are fractionating column and fractional distillation?
(class: 9th std )    Science

  Name the material which shows the average properties of the constituents contained in it.
(class: 9th std )    Science

  Identify solution among the following mixtures (a) gun powder (b) aerated water (c) soil (d) blood
(class: 9th std )    Science

  Most elements are (a) solids (b) liquids (c) gases (d) mixtures
(class: 9th std )    Science

  Components retain their properties in a (a) compound (b) mixture (c) element (d) none of these
(class: 9th std )    Science

  Gases e separated from each other by (a) fractional evaporation (b) fractional distillation (c) fractional crystallization (d) fractional sublimation
(class: 9th std )    Science

  Shaving cream is colloidal solution of (a) gas in liquid (b) liquid in liquid (c) solid in liquid (d) gas in solid
(class: 9th std )    Science

  Which of the following is a compound: (a) air (b) solution (c) marble (d) stainless steel
(class: 9th std )    Science

  Which one of the following may be termed as a pure substance: (a) sodium chloride (b) soft drink (c) aerosol (d) soil.
(class: 9th std )    Science

  Which one of the following is a physical change (a) burning of agnesium (b) exposure of iron to moisture (c) dissolution of sugar in water (d) formation of a compound
(class: 9th std )    Science

  Emulsion is a colloidal solution of liquid in (a) solid (b) liquid (c) gas (d) air
(class: 9th std )    Science

  Which is a homogeneous mixture? (a) it has a fixed composition (b) it has uniform composition (c) it has non-uniform composition (d) it can not be broken down to simpler substances
(class: 9th std )    Science

  Name three or more different kind of print formats. What aout multi-media formats? What are the differences and similarties between the two?
(class: 9th Std )    Social Studies

  what is the myosis ?
(class: 9th Std )    Science

  Find the energy in kWh consumed in 24 hours by two electric devices, one of 100 W and other of 500 W.
(class: 9th Std )    Science

    

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