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General Knowledge > General Knowledge > Basic Science

1 Which of the following is an element?
 
1Ruby
2Sapphire
3Emerald
4Diamond
 
Answer: Option4
2 The two elements that are frequently used for making transistors are —
 
1Boron and Aluminium
2Silicon and Germenium
3Iridium and Tungsten
4 Niobium and Columbium
 
Answer: Option2
3 Galvanised iron sheets have a coating of
 
1lead
2chromium
3zinc
4tin
 
Answer: Option3
4 Branch of agriculture concerned with the production of crops–
 
1Agrotology
2Agronomy
3Agrostology
4 Anthropology
 
Answer: Option2
5 In which of the following activities Silicon Carbide is used ?
 
1Making cement and glass
2Disinfecting water and ponds
3Making castes for statues
4Cutting very hard substances
 
Answer: Option4
6 Which metal pollute the air of a big city?
 
1Copper
2Chromium
3Lead
4Cadmium
 
Answer: Option3
7 Which of the following is used as a lubricant?
 
1Graphite
2Silica
3Iron Oxide
4Diamond
 
Answer: Option1
8 Balloons are filled with
 
1nitrogen
2helium
3oxygen
4argon
 
Answer: Option2
9 Which form of phosphorus is used in safety metals?
 
1Red Phosphorus
2White Phosphorus
3Yellow Phosphorus
4 Black Phosphorous
 
Answer: Option1
10 The gas usually filled in electric bulb is —
 
1Hydrogen
2 Oxygen
3 Nitrogen
4Carbon di-oxide
 
Answer: Option3
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