Chemistry Past Questions and Answers

In the electrolysis of aqueous solution of K<sub style='font-size: smaller;'>2</sub>SO <sub style='font-size: smaller;'>4</sub> in the above cell, which species migrate to the anode?

The tabulated results below were obtained by titration 10.0 cm<sub style='font-size: smaller;'>3</sub> of water with soup. The titration was repeated with the same sample of water after boiling. The ratio of permanent to temporary hardness is

Use the options above to answer this question. Which is the structural formula for pent-2-enoic acid?

10cm<sup style='font-size: smaller;'>3</sup> of hydrogen fluoride gas react with 5cm<sup style='font-size: smaller;'>3</sup> of dinitrogen difluoride gas (N<sup style='font-size: smaller;'>2</sup>F<sub style='font-size: smaller;'>2</sub>) to form 10<sub style='font-size: smaller;'>3</sub> of a single gas. Which of the following is the most likely equation of the reaction?

The number of atoms of chlorine present in 5.85g of NaCl is [Avogaro's Number = 6.02 x 10<sup style='font-size: smaller;'>23</sup>]