Chemistry The element used for making solar cells is Silicon Calcium Magnesium Sodium Silicon Calcium Magnesium Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sulphur dioxide bleaches colouring matter by : Dehydration Decomposition Reduction Oxidation Dehydration Decomposition Reduction Oxidation ANSWER DOWNLOAD EXAMIANS APP
Chemistry The pH of human blood is between : 4.5-5 7.5-8 6.5-7 44052 4.5-5 7.5-8 6.5-7 44052 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Acid rain' is caused due to air - pollution by Carbon monoxide Nitrous oxide and sulphur dioxide Carbon dioxide Methane Carbon monoxide Nitrous oxide and sulphur dioxide Carbon dioxide Methane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is biodegradable ? Paper Aluminium Plastic D.T. Paper Aluminium Plastic D.T. ANSWER DOWNLOAD EXAMIANS APP
Chemistry The ‘Green House effect’ is produced due to the presence of excess amount of Nitrogen dioxide Carbon monoxide Sulphur dioxide Methane Nitrogen dioxide Carbon monoxide Sulphur dioxide Methane ANSWER DOWNLOAD EXAMIANS APP