Answer to Question #6034 in Physical Chemistry for dxraj

Question #6034
a student given four samples labeled w,x,y and z.all have a metallic luster.she is told that the solids could be gold,lead sulfide,mica,(which is quartz ),and iodine.the result of her investigations are:(a)w is a good conductor;x,y, and z are poor electrical conductors.(b)When the solids are hit with hammer,w flattens out,x shatters into many pieces,y is smashed into powder, and z is not affected.(c)When the solids are heated with Bunsen burner,y melts with some sublimation,but x,w, and z do not melt.(d)In tretment with 6 M ammonia,x dissolves; there is no effect on w,y, or z.On basis of these test results,identify the solids and explain your answers
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