Chemistry Past Questions and Answers

Which of the following is used in the manufacture of bleaching powder?

A man suspected of being drunk is made to pass his breath into acidified potassium dichlormate solution. If his breath carries a significant level of ethanol, the final colour of the solution is?

When pollen grains are suspended in water and viewed through a microscope, they appear to be in a state of constant but erratic motion. This is due to?

The energy change (ΔH) for the reaction CO(g) + (1)/(2)O_2(g) → is?
(ΔHi(CO) = -110.4 kJ mol^-) (ΔHi(CO₂) = -393 kJ mol^-)

Tetraoxosulphate (IV) ions are finally tested using?