Chemistry Ozone depletion in the atmosphere is mainly caused by Hydrogen sulphide Sulphur dioxide Chlorofluorocarbon Nitrogen dioxide Hydrogen sulphide Sulphur dioxide Chlorofluorocarbon Nitrogen dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry A balloon filled with helium rises in air because Helium pushes down on the air below the balloon The balloon is weightless Helium is less dense than air Air exerts an upward force on the balloon Helium pushes down on the air below the balloon The balloon is weightless Helium is less dense than air Air exerts an upward force on the balloon ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following fibres catches fire least ? Rayon Nylon Terricot Cotton Rayon Nylon Terricot Cotton ANSWER DOWNLOAD EXAMIANS APP
Chemistry Match the sourc in Column B with the product of Column A. (Product) Column B (Source)A. Formic acid1. LemonB. Citric acid 2. TamarindC. Tartaric acid3. Ants A B C3 2 1 A B C 2 1 3 A B C 2 3 1 A B C 3 1 2 A B C3 2 1 A B C 2 1 3 A B C 2 3 1 A B C 3 1 2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The percentage of oxygen in air is approximately 0.01 1 0.21 0.78 0.01 1 0.21 0.78 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ferrous sulphate is used in water treatment as a/an Oxidizing agent Adsorbent Reducing agent Coagulant aid Oxidizing agent Adsorbent Reducing agent Coagulant aid ANSWER DOWNLOAD EXAMIANS APP
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