Related Questions

  1. In the manufacture of sulphuric acid by contact process, Tyndall box is used to
  2. A sample of CaCO₃ is 50% pure. On heating 1.12 L of CO₂ at STP is obtained
  3. The oxidation number of As in H₂AsO₄⁻ is
  4. ³⁵₁₇Cl and ³⁷₁₇Cl are two isotopes of chlorine. If average atomic weight is 35.5
  5. Because of lanthanoid contraction,which of the following pairs of elements