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A mixture of iron filings and sand can be separated by
1 Heating
2 Sublimation
3 Hand picking
4 Magnetic separation
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Enriched uranium used in a nuclear reactor is 1 Uranium freed of all impurities 2 Uranium treated with radiation 3 Uranium alloyed with aluminum 4 Uranium with a high percentage of a particular isotope
What are luminous irregular nebulae?
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide
Define science
0 Answers Mahatma Gandhi University,
plants in a food chain are actually the
2 Answers Competitive Exams, Stenographer,
Ozone attacks 1 Mercury and silver 2 Copper 3 Silver and iron 4 None of these
What are soaps? 1 Salts of silicates 2 Esters of heavy fatty acids 3 Sodium or potassium salts of heavier fatty acids 4 Mixture of glycerol and alcohols
Quartz crystals normally used in quartz clocks etc. is chemically 1 Sodium silicate 2 Germanium oxide 3 Silicon dioxide 4 None of these
The isotope of uranium capable of sustaining chain reactions is 1 U-235 2 U-238 3 U-239 4 None of these
Name the scientist who has been invited by the Srilankan Governement to have a Study on Employment development?
The material used for bleaching paper pulp is 1 Chlorine 2 Caustic soda 3 Sodium hypochlorite 4 Lime
Write about recreational function of Science
0 Answers Mahatma Gandhi University,
Biological Sciences 
