Which of the following causes the LEAST damage to the ozone layer?
Which of these statements is true about the atmosphere?
A student prepared a primary standard solution of benzoic acid in a volumetric flask, and used it to standardise a sodium hydroxide solution. For which pieces of equipment should distilled water be the last rinse before the start of the experiment?
In which of the following is there a decrease in the oxidation state of the underlined element?
What is a difference between the combustion and the fermentation of glucose?
Atomic absorption spectroscopy (AAS) is the most suitable method to find the concentration of the named ions in which solution? A solution which contains
Which of the following is a correct nuclear equation for the production of a transuranic element?
In which of the following pairs of ionic compounds does the first one form an acidic solution and the second one a basic solution?
Biochemical oxygen demand (BOD) is an indication of which of the following?
A small sample of a white solid was added to nitric acid, resulting in the formation of bubbles as the solid disappeared. Another sample of the same solid changed a colourless Bunsen flame to red.
Cellulose an example of which of the following?
This is the equation of a system at equilibrium:
What reactants are needed to produce this ester?
Ethylene can be obtained by which of the following methods?
What is the common name of CH2=CHCl?