Chemistry Past Questions and Answers

What mass of a divalent metal M (atomic mass = 40) would react with excess hydrogen gas measured at S.T.P?

In the solubility curve above, water at 98<sup style='font-size: smaller;'>o</sup>C is saturated with KCL and KCIO <sub style='font-size: smaller;'>3</sub> What is the percentage of KCL impurity in the crystals formed when the solution is cooled to 30 <sup style='font-size: smaller;'>o</sup>C?

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?