Ncert – class 6- science – Chapter 3: Separation of Substances 1 Welcome to your Ncert - class 6- science - Chapter 3: Separation of Substances 1 1. Wheat flour is separated from wheat bran by the method of: sieving handpicking filtration winnowing None 2. The rate of going into the solution is equal to the rate of coming out of the solution that indicates the solution is : dilute unstaurated saturated concentrated None 3. Find out the correct statement regarding a saturated solution of salt in water? Crystals begin to grow An equilibrium has been established All dissolving has stopped Crystals of the solute will visibly continue to dissolve None 4. Evaporation followed by condensation occurs in: Evaporation Sublimation Filtration Distillation None 5. A mixture of pepper and sand can be dissolved in water. The mixture can be separated by the method %BLANK% Filtration None 6. To make a saturated solution, 90 g of NaCl is dissolved in 2000 g of water at 293 K. Find its concentration at this temperature by mass. 0.045 4 None of these 23 None 7. Assertion: A saturated solution is not necessarily concentrated. Reason: Dilute and concentrated are terms that signify only the relative amount of solute dissolved in a solvent Assertion is correct statement but reason is the wrong statement. Assertion and reason both are correct statements but the reason is not the correct explanation for assertion. Assertion and reason both are correct statements and reason is the correct explanation for assertion. Assertion is wrong statement but reason is correct statement None 8. Threshing is a method used to separate: None of these grains from stalks husk particles from grains stones from grains None 9. Which of these terms indicate there is a large quantity of solute, compared with the amount of solvent, in a solution? Dilute Concentrated Soluble Exhaustible None 10. What is a saturated solution? A solution in which the maximum amount of solute is dissolved under any conditions A solution in which the minimum amount of solute is dissolved under the current conditions A solution that is full of solid substance A solution in which the maximum amount of solute is dissolved under the current conditions None 11. A few coloured glass pieces that are big in size are mixed with sugar. The easiest way to separate them is: handpick the sugar particles heat the mixture add the mixture to water handpick the glass pieces None 12. A mixture contains two solids A and B. Solid A is light in weight while solid B is very heavy. Their sizes are almost the same. Here, A is the unwanted component. To get pure solid B, which separation method would you suggest? Sieving Filtration Winnowing Magnetic separation None 13. Which one of the following is not a term generally used to describe a solution? Concentrated Saturated Dilute Super concentrated None 14. How will you test given solution is saturated or not? Add more solute, if it dissolves, it is saturated Add more solute, if it dissolves, it is unsaturated None of the above Add more solute, if it does not dissolve, it is unsaturated None 15. Salt dissolved in water can be recovered by: 16. Which technique can be used to separate iron from a mixture of iron and copper? Solvent extraction Magnetic separation Sublimation Sedimentation None 17. Winnowing is useful only when: two solids have different melting points two solids have different boiling points two solids have different weights two solids have different magnetic properties None 18. Components of a mixture which are separated by sieving, get separated based on their: difference in weight difference in colour difference in shape difference in size None 19. A very large quantity of mixture contains tiny particles of three different substances X, Y and Z. They are of the same size, cubical in shape and yellow in colour. X particles are very heavy, insoluble, non-magnetic and contribute 50% of the mixture. Y particles are very light, insoluble, non-magnetic and contribute 40% of the mixture. And Z particles are actually iron pieces. Which of the following methods can separate X, Y and Z in the fastest manner? Sieving-Magnetic separation - Filtration Magnetic separation-Winnowing Handpicking - Sublimation- Sieving Winnowing - Magnetic separation None 20. Decantation can be used to separate: None of the above homogeneous liquid-liquid mixtures heterogeneous solid-liquid mixtures heterogeneous and homogeneous solid-liquid mixtures None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.