Q.1
What metal should the wire loop be made of that is holding your unknown compound during a flame test?
  • Copper
  • Silver
  • Gold
  • Platinum
Q.2
A white precipitate results from the reaction between an unknown substance and sodium hydroxide. Which ion CANNOT be present in the unknown substance?
  • Calcium 2+
  • Magnesium 2+
  • Aluminium 3+
  • Copper 2+
Q.3
Which of the following can iodine NOT be used for testing for?
  • Presence of carbon dioxide
  • Unsaturation of oils
  • Presence of starch
  • Unsaturation of hydrocarbons
Q.4
A titration is used to accurately measure volumes of liquids required to carry out chemical reactions such as neutralisation reactions. Name the long glass tube which is required to carry out a titration.
  • Pipette
  • Burette
  • Clamp stand
  • Conical flask
Q.5
The meniscus is the curve in the upper surface of a liquid caused by surface tension. When measuring the amount of liquid held in a burette, which part of the meniscus do you measure from?
  • The bottom
  • The edge
  • The average height
  • The top
Q.6
Which of the following compounds would burn yellow in the flame test?
  • Sodium chloride
  • Calcium chloride
  • Potassium chloride
  • Barium chloride
Q.7
Which element produces a green flame when burned in a flame test?
  • Lithium
  • Sodium
  • Potassium
  • Barium
Q.8
A reddish brown precipitate results from the reaction between an unknown substance and sodium hydroxide. Which ion is present in the unknown substance?
  • Copper 2+
  • Iron 2+
  • Aluminium 3+
  • Iron 3+
Q.9
Three unknown solutions are added to test tubes of dilute nitric acid and silver nitrate. Each shows a positive result for the test. What ions are present in each tube in order if the colours produced are white, cream and pale yellow?
  • Iodide, bromide, chloride
  • Chloride, iodide, bromide
  • Chloride, bromide, iodide
  • Iodide, chloride, bromide
Q.10
A chromatogram is produced in a process called chromatography. There are several types of chromatography. Which of the following is NOT a type of chromatography?
  • Gas - liquid
  • Gel permeation
  • Ion-exchange
  • UV-Visible
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