Chemistry Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ? Hardness Alkalinity Eutrophication Acidity Hardness Alkalinity Eutrophication Acidity ANSWER DOWNLOAD EXAMIANS APP
Chemistry Vulcanized rubber contains sulphur 0.02 10-15% 7-9% 3-5% 0.02 10-15% 7-9% 3-5% ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following is pure matter ? Brass Carbon–dioxide Air Iron Brass Carbon–dioxide Air Iron 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 C and d A and b A and c B and c C and d A and b A and c ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nitrogen forms a variety of compounds in all oxidation states ranging from –3 to + 5 –3 to + 6 –3 to + 3 –3 to + 4 –3 to + 5 –3 to + 6 –3 to + 3 –3 to + 4 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The lustre of the metals is because of Absorption of light due to the presence of cavities Reflection of light due to the presence of free electrons High polish High density, due to closed packing of atoms Absorption of light due to the presence of cavities Reflection of light due to the presence of free electrons High polish High density, due to closed packing of atoms ANSWER DOWNLOAD EXAMIANS APP
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