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?
Biochemical oxygen demand (BOD) is an indication of which of the following?
What is the common name of CH2=CHCl?
In which of the following pairs of ionic compounds does the first one form an acidic solution and the second one a basic solution?
Which of the following is a correct nuclear equation for the production of a transuranic element?
In which of the following is there a decrease in the oxidation state of the underlined element?
Which of the following is NOT a suitable method to distinguish between propene and octane?
In which of the following mixtures would a reaction occur?
Which of the following has the highest boiling point?
Ethylene can be obtained by which of the following methods?
Cellulose an example of which of the following?
Which of these statements is true about the atmosphere?
Which of the following causes the LEAST damage to the ozone layer?
This is the equation of a system at equilibrium:
Atomic absorption spectroscopy (AAS) is the most suitable method to find the concentration of the named ions in which solution? A solution which contains