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  1. Froath floataton proess is used for the concentration of
  2. Which of the following is the coldest region
  3. If the atomic number of an element is 33, it will be placed in the periodic table
  4. Equal volumes of 0.1 M AgNO₃ and 0.2 M NaCl are mixed
  5. A mixture of gases contains H₂ and O₂ gases in the ratio of 1:4(w/w).