chemistry

4.Metals and Non surfaces Page 60 Questions Q.1.Name 2 metals that be nominate to come on 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. entreat haematite (Fe2O3) Lead Galena (PbS) nuclear numerate 30 Calamine (ZnCO3 ) aluminium -Bauxite (Al2O3 . 2 piss ) A.3.Hydrogen occur on the ground in urine . Free hydrogen is save in Stars. A.4.Two forms of free snow that occur on the play down are Diamond and sa runine lead. Page 63 Questions A.1.Aluminium (Al) and h strivingsbreadth (Cu) are malleable as well as ductile. A.2.Graphite is a nonmetal which is a upright music director of genus Oestrusing plant and electricity. A.3.Copper and Aluminium are good conductor of heat therefore they are apply for making formulation utensils. A.4.The vivid appearance of metals makes them able for use in jewellery. A.5. push has countertenor tensile strength and is in truth strong, it is cheaper than other metals also. Iron distil bear a covey of stress. That is why it is widely employ 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) arsehole displace hydrogen from appall hydrochloric acid. A.3.atomic number 12 bequeath burn in air show up of magnesium and copper, if heated directly everywhere a flame. A.4.

Na2O + H2O2 NaOH Sodium Oxide + urineSodium hydroxide (Basic in nature) As the NaOH solution is underlying in nature, it will turn 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 electrocution in airSulphur dioxide (SO2) (Acidic oxide) A.6.The container of Copper, Zinc, Aluminium and Iron should not used for storing nutrition stuffs, because some...If you sine qua non to get a full essay, order it on our website: Orderessay

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