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Friday, 6 March 2020

Chemistry- Questions and Answers 20

Chemistry- Questions and Answers 20
611. Element stored in wax: 
Lithium

612. Sodium and potassium are kept in:
Kerosene 

613. Rubber is soluble in: 
Benzene (C6H6)

614. The only acid shows the characteristics of alkali is:
Boric acid 

615. The catalyst used for the production of sulphuric acid is: 
Vanadium pentoxide 

616. Diamond is Chemical: 
Pure carbon

617. The main chemical substance present in the bones and teeth of animal is: 
Calcium phosphate

618. Father of the Indian Chemical Industry:
Acharya Prafulla Chandra Ray 

619. Bosch process is used in the industrial preparation of:
Hydrogen 

620. The alloy used for making the Oscar statue: 
Britanium

621. The metal is known as 'Rainbow metal':
Iridium 

622. The scientific name of Vitamin B 9 is:
Folic acid 

623. The alkali most commonly used to make bathing soap: 
Potassium hydroxide

624. Elements showing properties of both metals and non-metals:
Metalloids

625.  Metals & Ores
Metals & Ores 
Metals
Ores
 Aluminium (Al) 
Bauxite, Corundum, felspar, Cryolite, Kaolin 
Antimony (Sb)
Stibnite
Barium(Ba)
Barite, Witherite 
Cadmium (Cd)
Greenockite
Calcium (Ca)
Chalk, Quicklime, Calcite, Dolomite, Gypsum, Asbestos  
Chromium (Cr)
Chromite
Copper (Cu)
Malachite, Chalcocite, Chalcopyrite, Cuprite 
Gold (Au) 
Quartz, Calaverite, Solvents
Iron (Fe)
Hematite, Magnetite, Limonite, Copper pyrites 
Lead (Pb)
Galena
Magnesium(Mg)
Magnesite, Dolomite, Epsom salt, Carnalite 
Manganese(Mn)
Pyrolusite
Mercury (Hg)
Cinnabar 
Potassium (K)
Carmelite, Sylvite, Potash
Silver (Ag)
Argentite
Sodium (Na)
Rock Salt, Trona, Borax
Strontium (Sr) 
Strontianite, Celestine 
Tin(Sn)
Cassiterite
Zinc (Zn)
Zincite, Eerulinite, Calamine 
Uranium (U)
Uraninite 
Tungsten (W)
Wolframite, Scheelite
Nickel (Ni) 
Pentlandite, Milarite
Beryllium (Be)
Beryl 

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