Is Matter Around Us Pure

Question 1Which separation techniques will you apply for the separation of the following?(a) Sodium chloride from its solution in water.(b) Ammonium...

Question 4Explain the following, giving examples.(a) Saturated solution(b) Pure substance(c) Colloid(d) Suspension

Question 5Classify each of the following as a homogeneous or heterogeneous mixture.Soda water, wood, air, soil, vinegar, and filtered tea.

Question 6How would you confirm that a colourless liquid given to you is pure water?

Question 7Which of the following materials fall into the category of 'pure substance'?(a) Ice(b) Milk(c) Iron(d) Hydrochloric acid(e) Calcium...

Question 8Identify the solutions among the following mixtures.(a) Soil(b) Sea water(c) Air(d) Coal(e) Soda water

Question 9Which of the following will show the 'Tyndall effect'?(a) Salt solution(b) Milk(c) Copper sulphate solution(d) Starch solution

Question 10Classify the following into elements, compounds and mixtures.(a) Sodium(b) Soil(c) Sugar solution(d) Silver(e) Calcium carbonate(f) Tin(g)...

Question 11Which of the following are chemical changes?(a) Growth of a plant(b) Rusting of iron(c) Mixing of iron filings and sand(d) Cooking of...

Question 2How are sol, solution and suspension different from each other?

Question 3To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.