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  1. Cosin used to detect end point of precipitation titration by absorption is called
  2. Which of the following is most volatile
  3. M⁺³ ion loses 3e⁻. Its oxidation number will be
  4. Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is
  5. When x litres hydrogen and chlorine are mixed, moles of HCl is