Chemistry Past Questions and Answers

The electrons of two atoms Y and Z are arranged in shells as shown above. The bond formed between the atoms of Y and Z is

50 cm<sup style='font-size: smaller;'>3</sup> of sulphur (lV) oxide, 800 cm<sup style='font-size: smaller;'>3</sup> of carbon (IV) oxide will respectively saturate 1.0cm<sup style='font-size: smaller;'>3</sup> of water at 15<sup style='font-size: smaller;'>o</sup>C. Which of the following is suitable for demonstrating the fountain experiment?

The data in the table above shows the rate of reaction of nitrogen (ll) oxide with chlorine at 25<sup style='font-size: smaller;'>o</sup>C It can be concluded that doubling the initial concentration of NO increase the rate of reaction by a factor of

There is a large temperature interval between the melting point and the boiling point of a metal because?

There is a large temperature interval between the melting point and the boiling point of a metal because?