Question

17. Write any two uses of washing soda. 18. Write any two uses of Bleaching powder. 19. Name the important products from the chlor-alkali process. 20. What are amphoteric oxides? Give examples. 21. How are alkalis prepared ? 22. Write the differences between metals and non-metals? 23. Write the electron dot formula for sodium, oxygen and magnesium. 24. Ionic compounds have high melting points. Give reasons 25. Show the formation of Na2O by the transfer of electrons 26. Show the formation of MgO by the transfer of electrons 27. Name the metals that are extracted by reduction using carbon. 28. Name the metals that are extracted by electrolysis. 29. Define the following terms a) Mineral b) Ore c) Gangue 30. State two ways to prevent the rusting of iron? 31. Give reasons why copper is used to make hot water tanks and not steel 32. Match the following column ‘A’ with column ‘B’ Alloys of iron
constituents and uses
1. Stainless steel 2. Nickel steel
3. Alnico instruments and utensils 4. Invar steel permanentmagnets
e) Iron, nickel and carbon pendulum of clocks, precision measuring tapes f) Iron, and carbon pipes, nails, sheets, tools
33. Write the electron dot formula of CO2 34. Write the electron dot structure of ethane. 35. Write the difference between saturated and unsaturated hydrocarbons. 36. Name the following : 37. Write the difference between ethanol and ethanioc acid based on physical properties 38. Write the difference between ethanol and ethanoic acid based on chemical properties 39. Why does micelle formation take place when soap is added to water? Will a micelles be formed in other solvents such as ethanol also? 40. What are homologous series? 41. Explain the mechanism of the cleaning actions of soaps. 42. Explain the formation of scum when hard water is treated with soap. 43. What are the disadvantages of Mendeleev’s periodic table 44. What is the valency of magnesium with atomic number 12 and sulphur with atomic number 16? 45. Which elements have the largest and the smallest atoms in the 3rdperiod? 46. How does the atomic radius change as you go from left to right in a period?
d) iron-, nickel, aluminium cobalta)copper and zinc – used in decorative materials
b) iron, carbon , nickel-machinery parts and drilling instruments
c) iron, carbon , nickel chromium- surgical​

Answer 1

17. for washing clothes

18 for washing dish

19 . salt

20 . argon

21. in middle tem

22. metal have lustre non metal have not lustre non metal absorbed heat non metal not absorbed

23. co2 and so

please mark as brilliant

my answer is correct answer

this answer is correct answer

Answer 2

Answer:

Explanation:

Image result for how does metal oxides differ from non metal oxides ?​

Ionic metal oxides react with water to give hydroxides (compounds containing the OH− ion) and resultant basic solutions, whereas most nonmetal oxides react with water to form acids and resultant acidic solutions