Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 CuO CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 CuO ANSWER DOWNLOAD EXAMIANS APP
Chemistry "Paramagnetism" is the property of Unpaired electrons Completely vacant electronic subshells Completely filled electronics subshells Paired electrons Unpaired electrons Completely vacant electronic subshells Completely filled electronics subshells Paired electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used to make light weight, but strong plastic ? Polythene Methyl Methacrylate Polyvinyl Chloride Nylon Polythene Methyl Methacrylate Polyvinyl Chloride Nylon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The sewage obtained from water closets and urinals is known as Industrial waste Sullage Garbage Sanitary waste Industrial waste Sullage Garbage Sanitary waste ANSWER DOWNLOAD EXAMIANS APP
Chemistry The green colour seen in firework displays is due to the chloride salt of : Strontium Barium Calcium Sodium Strontium Barium Calcium Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal used to recover copper from a solution of copper sulphate is Hg Ag Na Fe Hg Ag Na Fe ANSWER DOWNLOAD EXAMIANS APP
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