CSS General Knowledge Topic 1 Everyday Science With Answers

CSS General Knowledge Topic 1 Everyday Science

Sr. # Questions Answers Choice
1 Permanent hardness of water may be removed by the addition of: Aluminium  Sodium carbonate Lime Potassium
2 The gases used in different types of welding would include: Oxygen and acetylene Hydrogen and nitrogen Oxygen and nitrogen Hydrogen and helium
3 Heavy water is: Tritium oxide Deuterium oxide Rain water Water at -4°C
4 The gas usually exist in the electric bulb is: Hydrogen Nitrogen Oxygen Carbon dioxide
5 Which of the following is not a neutral oxide? Sulphur dioxide Water Nitric oxide Nitrous oxide
6 Which of the following gas is not known as green house gas? Methane Nitrous oxide Carbon dioxide Hydrogen
7 The two elements that are frequently used for making transistors are: Boron and aluminium Silicon and germanium Iridium and germanium Niobium and columboan
8 Bleaching powder is made from: Sulphur dioxide lime and chlorine Bauxite Soda ash and lime
9 The filament of an electric bulb is made up of:  Iron Tungsten Nichrome Graphite
10 Washing soda is the common name of: Calcium carbonate Calcium bicarbonate Sodium carbonate Sodium bicarbonate
11 Which of the following is the best conductor of electricity? Silver Mica Copper Zinc
12 Which of the following is is the second most abundant metal in the earth's crust? Copper Iron Zinc Aluminium
13 Which of the following is used in pencils? Silicon Charcoal Graphite Phosphorus
14 Which of the following pairs does not contains a coinage metal? Zinc and Gold Copper and Gold Silver and Gold Copper and Silver
15 Which of the following substance is a bad conductor of electricity but a good conductor of heat? Asbestos Mica Celluloid None of these
16 The formula of plaster of Paris is: CaSO<sub>4</sub> Ca<sub>2</sub>SO<sub>4</sub>2H<sub>2</sub>O 2CaSO<sub>4</sub>H<sub>2</sub>O Ca<sub>2</sub>SO<sub>4</sub>2H<sub>2</sub>O<sub>2</sub>
17 Permanent hardness of water can be removed by adding: Potassium Washing soda Chlorine None of these
18 The chemical name for urea is: Anuerin Chloroethane Carbamide None of these
19 Non-stick cooking utensils are coated with:  Black paint&nbsp; Teflon P.V.C Polystyrene
20 Water has maximum density at: -1<span style="line-height: 1.5;">°C</span> 0<span style="line-height: 1.5;">°C</span> 4<span style="line-height: 1.5;">°C</span> 100<span style="line-height: 1.5;">°C</span>
21 Which metal is used in storage batteries?  Iron Lead Copper Tin
22 Sodium metal is kept under: Alcohol Water Petrol Kerosene
23 Most soluble in water is: Sugar Camphore Sulphur Common salt
24 Which of the following is an element? Ruby Diamond Sapphire Emerald
25 Which of the following is not an ore of aluminium? Azurite Bauxite Feldspar Cryolite
26 which of the following metals form an amalgam with other metals? Lead Tin Zinc Mercury
27 Stainless steel is an alloy of: Iron,carbon and nickel Iron,chromium and nickel Iron and manganese Iron and zinc
28 Which form of phosphorus is used in safety matches? White phosphorous Red phosphorous Black phosphorous Yellow phosphorous
29 Which of the following is used as a material for making protective windows in space probes? Diamond Steel Carbon Graphite
30 What is a laughing gas? Nitrous oxide Sulphur dioxide&nbsp; Carbon dioxide Carbon mono-oxide
31 From which mineral is radium obtained? Limestone Pitchblende Rutile Haematite
32 Which of the following is a non-metal that remains liquid at room temperature? Helium Limestone Bromine Phosphorus
33 Which of the following is a non-ferrous metal? Aluminium Iron Nickle Cobalt
34 Which of the following is used in beauty parlours for hair setting? Chlorine Sulphur Silicon Phosphorus
35 The most malleable metal is: Silver Gold Aluminium Sodium
36 Bio gas contains mainly: Butane Methane Carbon dioxide Sodium
37 The elements common to all acids is: Carbon Oxygen Sulphur Hydrogen
38 In which of the following activities silicon carbide is used? Cutting very hard substance Making cement and glass Disinfecting water of ponds Making casts for statues
39 The gas used to extinguish fire is: Neon Nitrogen Carbon dioxide Oxygen
40 Chlorofluorocarbons (CFC) gas is used in which of the following products?  Television Tube light Refrigirator None of these
41 The most abundant metal in the earth's crust is: Zinc Copper Silicon Iron
42 Balloons are filled with: Oxygen Helium Nitrogen Argon
43 Which of the following is a best conductor of electricity? Ordinary water Sea water Boiled water Rain water
44 Air is a: Mixture Element Compound Electrolyte
45 Diamond is an allotropic form of: Silicon&nbsp; Carbon Sulphure Germanium
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