Chemistry Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between 5 and 10 km 10 and 20 km 50 and 100 km 20 and 50 km 5 and 10 km 10 and 20 km 50 and 100 km 20 and 50 km ANSWER DOWNLOAD EXAMIANS APP
Chemistry Aqua regia is a 1 : 3 mixture, by volume, of Conc. sulphuric acid and conc. nitric acid Conc. nitric acid and conc. sulphuric acid Conc. hydrochloric acid and conc. nitric acid Conc. nitric acid and conc. hydrochloric acid Conc. sulphuric acid and conc. nitric acid Conc. nitric acid and conc. sulphuric acid Conc. hydrochloric acid and conc. nitric acid Conc. nitric acid and conc. hydrochloric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is a commercial source of energy? Sun Agricultural waste Natural gas Dried dung Sun Agricultural waste Natural gas Dried dung ANSWER DOWNLOAD EXAMIANS APP
Chemistry Biofertilizers convert nitrogen to ________ . Nitrogenase Nitrates Ammonia Amino acids Nitrogenase Nitrates Ammonia Amino acids ANSWER DOWNLOAD EXAMIANS APP
Chemistry Permanent – hardness of water may be removed by addition of Sodium carbonate Potassium Permangante Alum Lime Sodium carbonate Potassium Permangante Alum Lime ANSWER DOWNLOAD EXAMIANS APP
Chemistry When a bond is formed between two atoms, the energy of the system will Increase Decrease Remain the same May increase or decrease Increase Decrease Remain the same May increase or decrease ANSWER DOWNLOAD EXAMIANS APP
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