chemistry

4.Metals and Nonmetals Page 60 Questions Q.1.Name two metals that are nominate to devolve in the free state. A.Two metals that are tack to occur in the free state are specie and Silver. Q.2.Name the ores of the following metals: A.Iron haematite (Fe2O3) Lead Galena (PbS) atomic number 30 Calamine (ZnCO3 )Aluminium -Bauxite (Al2O3 . 2 piss ) A.3.Hydrogen occur on the ground in irrigate . Free hydrogen is present in Stars. A.4.Two forms of free light speed that occur on the background are Diamond and dimmed lead. Page 63 Questions A.1.Aluminium (Al) and hair (Cu) are malleable as well as ductile. A.2.Graphite is a nonmetal which is a hot conductor of genus Oestrusing plant and electricity. A.3.Copper and Aluminium are good conductor of heat therefore they are apply for making provision utensils. A.4.The vivid appearance of metals makes them suitable for use in jewellery. A.5.Iron has soprano tensile strength and is very strong, it is cheaper th an other metals also. Iron pull bear a lot of stress. That is why it is widely use in construction of buildings, bridges, railway 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) can displace hydrogen from demoralize hydrochloric acid. A.3.atomic number 12 will burn in air show up of magnesium and copper, if heated directly over a flame. A.4.

Na2O + H2O2 NaOH Sodium Oxide + urineSodium hydroxide (Basic in nature) As the NaOH solution is basic in nature, it will turn red litmus to blue. A.5.(a) Mg + H2OMg 2 O+ H2 magnesium + WaterMagnesium o! xide+ Hydrogen (Boiling) (b) Fe + HCl heatingFeCl3+ H2 (Moderate) Iron + Hydrochloric acidMagnesium oxide+ Hydrogen (dil.) (c) reciprocal ohm + type O Burning in airSulphur dioxide (SO2) (Acidic oxide) A.6.The container of Copper, Zinc, Aluminium and Iron should not utilize for storing food stuffs, because some...If you sine qua non to get a full essay, entrap it on our website: BestEssayCheap.com

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