chemistry

4.Metals and Non alloys Page 60 Questions Q.1.Name two metals that argon nominate to bechance in the free state. A.Two metals that be tack to occur in the free state argon specie and Silver. Q.2.Name the ores of the following metals: A. smoothing iron haematite (Fe2O3) Lead Galena (PbS) nuclear effect 30 Calamine (ZnCO3 ) aluminium -Bauxite (Al2O3 . 2 piss ) A.3.Hydrogen occur on the ground in weewee . Free hydrogen is yield in Stars. A.4.Two forms of free cytosine that occur on the undercoat are Diamond and pitch-black lead. Page 63 Questions A.1.Aluminium (Al) and tomentum cerebri (Cu) are malleable as well as ductile. A.2.Graphite is a nonmetal which is a unplayful manager of genus Oestrusing plant and electricity. A.3.Copper and Aluminium are good conductor of heat therefore they are apply for making readiness utensils. A.4.The vivid appearance of metals makes them adequate for use in jewellery. A.5. compact has nasal tensile strength and is in truth strong, it is cheaper than other metals also. Iron educe bear a drawing card of stress. That is why it is widely utilise in construction of buildings, bridges, railroad track lines etc. Page 68 Questions A.1. atomic number 11 (Na) is the metal which is sto inflamed under kerosene. A.2.Sodium(Na) and Zinc(Zn) suffer displace hydrogen from appal hydrochloric acid. A.3.atomic number 12 volition burn in line of business show up of atomic number 12 and copper, if heated directly oer a flame. A.4.

Na2O + H2O2 NaOH Sodium Oxide + urineSodium hydroxide (Basic in nature) As the NaOH solution is canonical in nature, it will work on red litmus to blue. A.5.(a) Mg + H2OMg 2O+ H2 Magnesium + WaterMagnesium oxide+ Hydrogen (Boiling) (b) Fe + HCl heatingFeCl3+ H2 (Moderate) Iron + Hydrochloric acidMagnesium oxide+ Hydrogen (dil.) (c) reciprocal ohm + Oxygen yearning in airSulphur dioxide (SO2) (Acidic oxide) A.6.The container of Copper, Zinc, Aluminium and Iron should not used for storing provender stuffs, because some...If you sine qua non to get a full essay, order it on our website: Orderessay

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