In which of the following is there a decrease in the oxidation state of the underlined element?
What is the common name of CH2=CHCl?
Which of the following is a correct nuclear equation for the production of a transuranic element?
Biochemical oxygen demand (BOD) is an indication of which of the following?
Which of the following causes the LEAST damage to the ozone layer?
This is the equation of a system at equilibrium:
In which of the following pairs is the second substance the conjugate acid of the first substance?
What reactants are needed to produce this ester?
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?
Ethylene can be obtained by which of the following methods?
Which of these statements is true about the atmosphere?
These are the colours of four indicators at low and high pH, and the pH range in which they change colour.
What is a difference between the combustion and the fermentation of glucose?
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?