Chemistry Past Questions and Answers

What volume of hydrogen would be left over when 300cm<sup style='font-size: smaller;'>3</sup> of oxygen and 1000cm of hydrogen are exploded in a sealed tube? [2H<sub style='font-size: smaller;'>2(g)</sub> + O<sub style='font-size: smaller;'>2(g)</sub> → 2H<sub style='font-size: smaller;'>2</sub> O<sub style='font-size: smaller;'>g</sub>]

What are the values of x, y and z respectively in the following in the following equation? MnO <sub style='font-size: smaller;'>2(s)</sub> + xHCI<sub style='font-size: smaller;'>(aq)</sub> → MnCI<sub style='font-size: smaller;'>2(g)</sub> + yHO<sub style='font-size: smaller;'>(l)</sub> + zCI<sub style='font-size: smaller;'>2(g)</sub>

Which of the following subtances will not produce effervescence with dilute hydeochloric acid?

What quantity of electrons in moles is needed to discharge two moles of aluminum from aluminum oxide (AI <sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3</sub>)

Two solutions containing Pb<sup style='font-size: smaller;'>2+</sup> and AI<sup style='font-size: smaller;'>3+</sup> respectively can be distingusihed using