Old-written material, which cannot be read easily can be read by

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1. The element present in the largest amount in rocks and minerals is
2. Bromine is
3. The type of glass used in making prisms and lenses is
4. Liquefied Petroleum gas (LPG) consists of mainly
5. Polythene is industrially prepared by the polymerisation of
6. Cell membrane is
7. Quartz crystals normally used in quartz clocks etc. is chemically
8. Water has maximum density at
9. The major ingredient of leather is
10. According to Daltons atomic theory the smallest particle which can exist independently is
11. Earth's seasons are caused by which of the following?
12. The fastest-running terrestrial animal is
13. Which of the following is commonly called a polyamide ?
14. The oxide of Nitrogen used in medicine as anaesthetic is
15. The colour of Emerald is
16. The chemial name of Uria is
17. The most important ore of Aluminium is
18. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
19. The metal that is present in Photo Films is
20. The removal of top soil by water or wind is called
21. When a gas is turned into a liquid, the process is called
22. Which of the following elements is obtained from sea weeds ?
23. The formula of Plaster of Paris is
24. Nitrification means
25. Which of the following elements is a metal
26. Old-written material, which cannot be read easily can be read by
27. What is the unit for measuring the pitch or frequency of sound ?
28. The hardest substance available on earth is
29. Which of the following is in liquid form at room temperature ?
30. Which of the following parts of the sun is easily visible only during a total solar eclipse?

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