1st PUC Chemistry Series-9 December 2, 2020December 23, 2020wefru PUC Science 1st Year Chemistry Series-9 quiz 0 Created on December 02, 2020 By wefru 1st PUC Chemistry Series 9 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q81 Find the secondary pollutant among these SO2 N2O PAN CO2 2 / 10 Q82 The reaction responsible for the radiant energy of the Sun is nuclear fusion nuclear fission chemical reaction combustion 3 / 10 Q83 Alum’s capacity to purify water is due to softens hard water pathogenic bacteria get destroyed it improves taste impurities’ coagulation 4 / 10 Q84 The coldest region of the atmosphere Stratosphere Mesosphere Troposphere Thermosphere 5 / 10 Q85 Which of the oxide of nitrogen is not a common pollutant? N2O5 N2O NO O2 6 / 10 Q86The compound essential for the process of photosynthesis has this element Mg Ca FE BaCl2 7 / 10 Q87. In the air, N2 and O2 occur naturally but they do not react to form oxides of nitrogen because oxides of nitrogen are unstable catalyst is required for the reaction N2 and O2 do not react with each other the reaction is endothermic 8 / 10 Q88. Which of the compounds is known as Slaked lime? Ca(OH)2 CaSO4 CaO CaCO3 9 / 10 Q89Which of the ions have maximum hydration energy? Be2+ Sr2+ Mg2+ Ca2+ 10 / 10 Q90 As compared to K, Na has larger atomic radius lower electronegativity lower melting point higher ionization potential Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz