1st PUC Chemistry Series-8 December 2, 2020December 23, 2020wefru PUC Science 1st Year Chemistry Series-8 quiz 0 Created on December 02, 2020 By wefru 1st PUC Chemistry Series 8 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q.71. H2O2 changes Cr2O72- ion to CrO5 in an acidic medium, the oxidation state of Cr in CrO5 is -6 +5 +6 -9 2 / 10 Q72 H2SO4 acts as a strong oxidising agent. In which of the reaction, is it not acting as an oxidising agent CaF2 + 2H2SO4 → CaSO4 + 2HF C + 2H2SO4 → CO2 + 2SO2 + 2H2O S + 2H2SO4 → 3SO2 + H2O Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O 3 / 10 Q73During a reaction of oxalic acid, potassium chlorate and sulphuric acid, the oxidation number of which of the element undergoes a maximum change H C Cl Na 4 / 10 Q74Find the redox reaction Both oxidation and reduction reaction In the atmosphere, O3 from O2 by lighting The reaction of H2SO4 with NaOH Evaporation of water 5 / 10 Q75 Find the oxidation state of I in H4IO6– Fe4[Fe(CN)6]3 ) [Fe(H2O)6]2- [FeBr4]– [Fe(H2O)5NO]SO4 6 / 10 Q76Which among the following compounds is the most reducing compound? H2S HNO2 SnCl2 H2SO3 7 / 10 Q77 Which among the following is the strongest oxidising agent? H2O2 O3 K2Cr2O7 KMnO4 8 / 10 Q78Photochemical smog normally does not contain Ozone Peroxyacetyl nitrate Chlorofluorocarbons Acrolein 9 / 10 Q79Depletion of the ozone layer is caused due to Freons Fullerenes Polyhalogens Ferrocene 10 / 10 Q80 Find the incorrect statement BOD value of clean water is less than 5 ppm carbon, sulphur and nitrogen oxides are the most widespread air pollutants carbon, sulphur and nitrogen oxides are the most widespread air pollutants dissolved oxygen concentration below 5 ppm is ideal for the growth of fish Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz