Question

Multiple Choice Questions ameter 7. Which of the following has the highest solubility at 313 K? (a) KNO3 (b) Naci (c) KC (4) NHẠC 8. Which of the following statements is true ? (a) Homogeneous mixtures can have variable composition (6) Homogeneous mixtures have fixed composition (C) Heterogeneous mixtures have fixed composition (d) Salt solution is heterogeneous mixture. 9. Alloys are ch are not in solubility es in liquids in this case 1. A pure substance/element contains (a) two or more types of particles (b) one type of particles (c) many types of particles (d) two or more forms of matter. 2. Which of the following is a colloidal solution? (ay Starch solution (6) Copper sulphate solution (c) Chalk powder in water (d) Kerosene oil and water. 3. Which of the following is not a mixture ? (a) Soap solution (b) Blood Carbon dioxide (d) Coal 4. Which of the following is a physical change? (a) Burning of a candle (b) Rusting of iron Freezing of water (d) Digestion of food, 5. Which of the following is a chemical change? (a) Melting of wax (b) Mixing of iron filings with sulphur powder 6 Cooking of food (d) Dissolving salt in water. 6. Which of the following has the highest solubility at 293 K? (a) KNO, (c) KCI (0) NH CI ids (a) pure substances for homogeneous mixtures (C) compounds (d) of fixed composition. 10. The size of particles of true solutions is fat 100 nm (d) > 1000 nm 11. Which of the following is the most stable ? (a) True solution (b) Colloidal solution (C) Suspension 100 120C (b) NaCI (d) Milk 12. 40 g of common salt is dissolved in 320 g of water. The mass percentage of salt is (a) 11.1% (b) 12.5% (c) 15% (d) 10% 9 Science öna LIH​

Answer 1

Answer:

homogenious mixture are of the giebm sksk