GCSE Chemistry – Separate Chemistry II – 1 – Exam Style Questions with Answers

Qualitative tests are used to identify ions in compounds.
Instrumental methods are often used for analysis.
Give a reason why instrumental analysis may be better than other methods of analysis.

A few drops of sodium hydroxide solution are added to a solution of iron(II) sulfate.
Iron(II) hydroxide is formed.
One other product is formed in this reaction.
What is the name of this other product?

Compounds are tested to see if they contain chloride, bromide or iodide ions.
Figure 5 shows a flow chart of this test.
Give the name of the apparatus that should be used to add a few drops of silver nitrate
solution to the test tube.

Figure 3 shows two tests carried out on a white solid and the results of the tests.
State the name of the gas given off in test 2.

The test for chloride ions was carried out on a solution.
Dilute nitric acid was added to the solution, followed by a few drops of silver nitrate solution.
A white precipitate formed.
Why is it necessary to add dilute nitric acid in this test?

Figure 18 shows the results of the flame tests on three compounds, P, Q and R.
Use Figure 18 to identify the metal ions in compounds P, Q and R
P ...........................................................
Q ...........................................................
R ...........................................................

A precipitate is produced when an alkaline solution is added to a solution containing some
metal ions.
Which of these is evidence of a precipitate being produced?

Figure 3 shows two tests carried out on a white solid and the results of the tests.
Which ion is shown to be present by the result of test 1?

A student carried out some tests on copper sulfate.
A solution of the copper sulfate was tested in a flame photometer.
Give an advantage of using a flame photometer, rather than a flame test, to test for
copper ions.

A student carried out some tests on copper sulfate.
A flame test was carried out on some copper sulfate crystals.
What colour should be seen when the flame test is carried out on copper sulfate?