Q.1.
What metal should the wire loop be made of that is holding your unknown compound during a flame test?
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?
Q.3.
Which of the following can iodine NOT be used for testing for?
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.
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?
Q.6.
Which of the following compounds would burn yellow in the flame test?
Q.7.
Which element produces a green flame when burned in a flame test?
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?
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?
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?