Chemistry Past Questions and Answers

A mixture of common salt, ammonium chloride and barium sulphate can best be separated by

Which of the following relationships between the pressure P, the volume V and the temperature T, represents an ideal gas behaviour?

The colour imparted to a flame by calcuium ion is

In the reaction M + N P;∆H = + QKJ. Which of the following would increase the concentration of the product?

In which of the following processes is iron being oxidized?<br/>1 Fe + H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub> → FeSO<sub style='font-size: smaller;'>4</sub> +H<sub style='font-size: smaller;'>2</sub><br/>2 FeSO<sub style='font-size: smaller;'>4</sub> + H<sub style='font-size: smaller;'>2</sub>S → FeS + H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub><br/>3 2FeCI<sub style='font-size: smaller;'>2</sub> + Cl<sub style='font-size: smaller;'>2</sub> → 2FeCl<sub style='font-size: smaller;'>3</sub><br/>4 2FeCl<sub style='font-size: smaller;'>3</sub> + SnCl<sub style='font-size: smaller;'>2</sub> + → 2FeCl<sub style='font-size: smaller;'>2</sub> + SnCl<sub style='font-size: smaller;'>4</sub>