Chemistry Which of the following is used to remove ink and rust stains on cloth? Ether Oxalic acid Alcohol Kerosene oil Ether Oxalic acid Alcohol Kerosene oil ANSWER DOWNLOAD EXAMIANS APP
Chemistry The BOD values of water indicate the Amount of oxygen used for biochemical oxidation Amount of organic debris Amount of ozone used for biochemical oxidation Amount of oxygen used for biochemical reduction Amount of oxygen used for biochemical oxidation Amount of organic debris Amount of ozone used for biochemical oxidation Amount of oxygen used for biochemical reduction ANSWER DOWNLOAD EXAMIANS APP
Chemistry When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in Raman spectra Absorption spectra Fluorescence Emission spectra Raman spectra Absorption spectra Fluorescence Emission spectra 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 B and c A and c C and d A and b B and c A and c C and d A and b ANSWER DOWNLOAD EXAMIANS APP
Chemistry Glycol is added to aviation gasoline because it Prevents freezing of petrol Reduces evaporation of petrol Reduces consumption of petrol Increases efficiency of petrol Prevents freezing of petrol Reduces evaporation of petrol Reduces consumption of petrol Increases efficiency of petrol ANSWER DOWNLOAD EXAMIANS APP
Chemistry All isotopes of the same element have ________ Different atomic numbers and the same atomic mass The same atomic number and the atomic mass Different atomic numbers and different atomic mass The same atomic number but different atomic masses Different atomic numbers and the same atomic mass The same atomic number and the atomic mass Different atomic numbers and different atomic mass The same atomic number but different atomic masses ANSWER DOWNLOAD EXAMIANS APP
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