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GK Chemistry For SSC Exams Test 73
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GK Chemistry For SSC Exams Test 73
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  • Question 1/10
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    Which one among the following polymers is used for making bullet-proof material?
    Solutions
    A bullet-proof material is made of polyethylene. Polyethylene molecules are long chains that can be branched or straight. The length and straightness of the chains and the purity of the plastic determines how strong it is. High grade polyethylene has been used to make bulletproof vests.
  • Question 2/10
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    Which one among the following substances evolved heat when dissolved in water?
    Solutions
    Quicklime is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. When limestone is heated, at about 10000 C it undergoes thermal decomposition. It loses carbon dioxide and turns into quicklime (calcium oxide).
  • Question 3/10
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    Aspirin is a _______.
    Solutions
    Aspirinalso known as acetyl salicylic acid is a salicylate medication often used to treat pain, fever, and inflammation.
  • Question 4/10
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    Solid carbon Dioxide is known as ____________.
    Solutions
    Dry ice also referred as the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue.
  • Question 5/10
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    A polymer which is used for making ropes and carpet fibres is ________.
    Solutions
    Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications including packaging and labeling, textiles (e.g., ropes, thermal underwear and carpets), stationery, plastic parts and reusable containers of various types, laboratory equipment, loudspeakers, automotive components, and polymer banknotes
  • Question 6/10
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    A bioenergy source obtained by fermentation to supplement fossil fuel petrol is
    Solutions
    Ethanol is a bio fuel obtained by fermentation to supplement fossil fuel petrol. It is most often used as a motor fuel, mainly as a biofuel additive for gasoline. It is commonly made from biomass such as corn or sugar. Bioethanol is a form of quasi-renewable energy that can be produced from agricultural feed stocks. It can be made from very common crops such as sugarcane, potato, cassava and corn.
  • Question 7/10
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    Neutrons were discovered by?
    Solutions
    James Chadwick discovered the neutron in 1932 while working at Cavendish Laboratory.
  • Question 8/10
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    Metal tea pots have wooden handles because __________.
    Solutions
    • Wood is a bad conductor of heat because it is a covalent compound, so they are used as handles of metal teapots.
    • Wood can't conduct heat & electricity as the electrons in it are bound to parent atom and are not free to move, so it does not possess freely movable charges; hence they cannot conduct electricity.
  • Question 9/10
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    Cooking vessels have wooden or bakelite handles because
    Solutions
    • Cooking vessels have wooden or bakelite handles because they are bad conductors of heat.
    • These act as a thermal barrier to help prevent the handle from becoming too hot.
  • Question 10/10
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    Which of the following acids serves as an electrolyte in a lead storage battery?
    Solutions
    Dilute sulfuric acid (H2S04) serves as the electrolyte in a lead-acid battery. Dilute sulfuric acid used for lead acid battery has ratio (to water) of 3:1 other components of the battery include: Lead peroxide (PbO2) and Sponge lead (Pb).
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