CSS General Knowledge Topic 1 Everyday Science With Answers

CSS General Knowledge Topic 1 Everyday Science

Sr. # Questions Answers Choice
1 Rusting of iron involves: Reduction Oxidation Decomposition  Displacement
2 which law was discovery the theory of nature selection evolution? talbot hunt ester darwin
3 which scientist discovered electron? takamine hall j. thomson long
4 What is condensation? Change of gas into solid Change of solid into liquid  Change of vapor into liquid  None of these
5 Which of the following is not a chemical reaction? Burning of paper  Digestion of food  Conversion of water into steam  Burning of coal
6 who discovered electrical waves? fisher gabor hertz wilson
7 Polythene is industrially prepared by the polymerization of: Methane  Ethylene  Styrene  Acetylene 
8 who discoverer cosmic rays? soddy wheeler victor hess planck
9 The neutral atom's two isotopes differ in the number of: Neutrons  Protons  Electron shells None of these
10 The main important feature of neutron bomb is that when it is dropped on a city,it would damage: The living organisms but spare buildings   Both the living organisms and buildings   The building but not living organisms  None of these
11 According to Dalton's atomic theory,the smallest particle which can exist independently is: A cation  An atom  A molecule  An anion 
12 Which of the following elements is not-radioactive? Zirconium  Thorium  Uranium  Plutonium 
13 Old written material,which cannot be read easily,can be read by: Infra red rays  Cosmic rays  Ultra-violet rays  None of these
14 Who suggested that most of the atom is located in the nucleus?  Bohr  Rutherford  Thompson  None of these
15 Which of the following colours in the visible spectrum has maximum range? Violet  Indigo  Red  Orange
16 Isotopes are separated by:  Filtratiom Distillation Sublimation  None of these
17 Which of the following is used as a moderator in nuclear reactor? Ordinary water Radium  Graphite  Thorium 
18 Atoms are composed of: Electrons  Protons  Neutrons  All of these
19 Which of the following has the least penetrating power? Alpha particles  Beta particles Gamma rays None of these
20 mention the discoverer of chloroform. hahn S.guthrie hoist colt
21 name the discoverer of chlorine. freud dohl fermi scheele
22 Atom bomb is based on the principle of: Nuclear fusion  Nuclear fission  Both (a) and (b) None of these
23 carbon dioxide was discovered by: harvey newton fisher soddy
24 calculus was discovered by: newton harvey spenser plato
25 point out the Wilson's discovery. chlorine calcium carbide electron chloroform 
26 Radioactive disintegration of uranium ultimately results in formation of: Radium  Thorium  Lead  Polonium
27 The isotope of uranium capable of sustaining chain reaction is: U-235 U-238 U-239 U-242
28 Which of the following is used as a coolant in nuclear reactors? Heavy water  Liquid sodium  Cadmium  Graphite 
29 Atoms of an element differ from those of all other element in: Atomic number and electronic configuration  Atomic number and number of valence electrons  Number of neutrons and electronic configuration  Number of neutrons and number of valence electrons 
30 Which of the following types of photons has the highest energy? Visible radiation  Radio waves  Gamma rays  X-rays 
31 In an atomic explosion,enormous energy is related which is due to the: Conversion of neutrons into protons  Conversion of mass into energy Conversion of mechanical energy intl nuclear energy None of these
32 Which radioactive pollutant has recently dawn the attention of the public,due to its occurrence in the building material?  Thorium  Radium  Radon Plutonium
33 What is the wavelength of visible spectrum? 1300 A<sup>0 _</sup>3000 A<sup>0</sup> 3900 A<sup>0</sup>_7600 A<sup>0</sup> 7700 A<sup>0 _</sup>7900 A<sup>0</sup> 8400 A<sup>0 _</sup>&nbsp;9700 A<sup>0</sup>
34 How many colors the sunlight spectrum has? 5 4 7 10
35 The difference between a nuclear reactor and an atom bomb is that: No chain reaction takes place in nuclear reactor while in the atomic bomb,there is a chain reaction. The chain reaction in nuclear reactor is controlled. The chain reaction in nuclear reactor is not controlled. None of these.
36 Which of the following is a good nuclear fuel? Uranium-238 Neptunium-239 Plutonium-239 Thorium-236
37 Nuclear fission is caused by the impact of: Proton&nbsp; Electron&nbsp; Neutron None of these
38 Which among the following is a positively charged particle emitted by a radioactive element? Beta rays Alpha rays Gamma rays Cathode rays
39 which scientist discovered blood circulation? harvey fisher bier wilson
40 who described bacteria? wilson leeuqenhoek newton fisher
41 who is the discoverer of atomic reactor? hertz faraday szilardt spencer
42 the discoveries of anti-rabies is: szilard fisher marconi pasteur
43 whose discoveries are aluminum and electroytic process? bell hall marconi none of these
44 who invented the steam-turbine? colaude yale parsons hedley
45 name the inventor of military tank. daimler swinston tesla biro
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