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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