HSC Chemistry Multiple Choice Quiz

The graph on the left shows the maximum dissolved oxygen concentration in water as a function of temperature at normal atmospheric pressure. What is the volume of O2 that can dissolve n 10.0L of water at \(25\,^{\circ}\)C and normal atmospheric pressure?

Bromine, \(Br_2\), dissolves in unsaturated hydrocarbons and reacts immediately. Which of the following is the best description of this process?

Which of the following groups contains ONLY acidic substance?

What flame colour is produced by barium ions in a flame test?

In a fermentation experiment, 6.50g of glucose was completely converted to ethanol and carbon dioxide. What is the mass of carbon dioxide produced?

Which of the following cations can be identified using a flame test?

A group of students produced a red solution by boiling red cabbage leaves in water. When dilute sodium hydroxide was added to the solution, it turned purple. When dilute hydrochloric acid was added to the red solution, no colour change occurred. Which of these substances, when added, is most likely to cause the red solution to change colour?

An understanding of Le Chatelier's principle is important in the chemical industry. Which prediction can be made using this principle?

What did the Bronstead-Lowry definition of acids identify that made it a significant improvement over earlier definitions?

Which term describes the relationship between oxygen and ozone?