Chemistry The iron ore which contains 72% of iron is : Haematite Limonite Magnetite Siderite Haematite Limonite Magnetite Siderite ANSWER DOWNLOAD EXAMIANS APP
Chemistry An electric iron has a heating element made of : Copper Nichrome Tungsten Zinc Copper Nichrome Tungsten Zinc ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is used for dating very old objects of archaeological importance? Carbon-14 Radium Tritium Phosphorus-31 Carbon-14 Radium Tritium Phosphorus-31 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Philosopher’s Wool is Zinc blende Zinc oxide Zinc carbonate Zinc sulphate Zinc blende Zinc oxide Zinc carbonate Zinc sulphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2 A and b A and c C and d B and c A and b A and c C and d B and c ANSWER DOWNLOAD EXAMIANS APP
Chemistry Greenhouse effect is caused by Nitrogen Nitrogen dioxide Carbon monoxide Carbon dioxide Nitrogen Nitrogen dioxide Carbon monoxide Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP