Study Notes of Chemistry

1. Acid rain is caused by the pollution of environment due to nitrogen oxide and sulphur dioxide.

2. The most chemically active element is Fluorine.

3. Chlorofluro carbon (CFCS) used in refrigerators causes ozone hole  formation.

4. Sodium/Potassium salt of stearic acid, palmitic acid and oleic acid is soap.

5. Aquaregia is a mixture of concentrated nitric acid and hydrochloric acid which can dissolve gold and platinum.

6. Coins are made of coinage alloy which consists of copper and nickel.

7. Coloured glasses for goggles contain ferrous oxide.

8. Coating of iron with zinc to prevent from rusting is called galvanisation.

9. Lead is used in petrol as an antiknocking agent.

10. Liquefied Petroleum Gas mainly consists of liquefied butane and isobutene.

11. Natural gas predominantly contain methane.

12. Ethylene is used for the artificial ripening of green fruit.

13. Gelatin is used in the manufacture of ice cream to prevent crystal growth.

14. Vulcanisation is the process of adding sulphur to rubber to make it strong and bounceable

15. Non stick kitchenware is coated with teflon (Poly tetra Fluro Ethylene) and potassium hydrogen tartar ate.

16. Stainless Steel is an alloy of iron (73%), Carbon (1%) Chromium (18%) and Nickel (8%)

17. Solder is an Alloy of lead (50%) and tin (50%)

18. Bronze is an alloy of copper and tin.

19. Brass is an alloy of copper (60-80%) and Zinc (40-20%)

20. Mercury and gallium are metals which are liquids at room temperature.

21. The hardest metal is Tungsten.

22. Wrought iron is the purest type of iron that contains least amount of carbon.

23.  Silver, gold and platinum are known as noble Metals.

24. Metals which has the highest density is osmium

25. Gun metal is made from tin and copper.

26. Cobalt is used in making rust - resistant alloys.

27. Steel is a form of iron. To make steel from iron, The carbon content is reduced from 5% to 0.5 - 1.5%)

28. Platinum metal occurs in its pure form in earth's crust

29. The first known super conductor is mercury.

30. Silver is the best conductor of heat and electricity

31. Iodine is a solid non-metal

32. Iron is the first metal used by man

33. Metallic cofactor present in chlorophyll is magnesium.

34. Metallic cofactor present in hemoglobin is iron.

35. Metal abundant in sea water is vanadium

36. The metal most abundant in human body is calcium.