Chemistry Permanent – hardness of water may be removed by addition of Sodium carbonate Alum Potassium Permangante Lime Sodium carbonate Alum Potassium Permangante Lime ANSWER DOWNLOAD EXAMIANS APP
Chemistry Iodine can be separated from a mixture of Iodine and Potassium Chloride by Sublimation Sedimentation Filtration Distillation Sublimation Sedimentation Filtration Distillation ANSWER DOWNLOAD EXAMIANS APP
Chemistry The material used in solar cells contains Silicon Thallium Tin Caesium Silicon Thallium Tin Caesium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The greenhouse effect is caused by the higher level of which gas in the atmosphere ? Carbon dioxide Nitrous oxide Carbon monoxide Sulphur dioxide Carbon dioxide Nitrous oxide Carbon monoxide Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Quartz is made of Calcium Silicate Calcium Sulphate Sodium Sulphate Sodium Silicate Calcium Silicate Calcium Sulphate Sodium Sulphate Sodium Silicate ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas that causes suffocation and death when coal or coke is burnt in a closed room is Ethane Carbon di-oxide Methane Carbon monoxide Ethane Carbon di-oxide Methane Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
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