Subsection 12.5. Identification of ions and gases for Chemistry, O Level - revisedeck

12.5. Identification of ions and gases

A subsection of Chemistry, 5070, through 12. Experimental techniques and chemical analysis

Listing 10 of 174 questions

The addition of dilute acid to a solution containing the anion Q and the subsequent use of limewater can be used to identify the anion Q. What is Q?

5070_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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Which ion reacts with aqueous ammonia to give a precipitate that dissolves in an excess of ammonia?

5070_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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When dilute hydrochloric acid is added to a white powder a gas is produced. The solution remaining is tested separately with small volumes of both aqueous ammonia and aqueous sodium hydroxide. A white precipitate is produced in both tests. What is the white powder?

5070_s12_qp_12

MCQ

2012

Paper 1, Variant 2

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Which reagent could be used to distinguish between dilute nitric acid and dilute hydrochloric acid?

5070_s12_qp_12

MCQ

2012

Paper 1, Variant 2

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Which ion reacts with aqueous ammonia to give a precipitate that dissolves in an excess of ammonia?

5070_s12_qp_12

MCQ

2012

Paper 1, Variant 2

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In which pair do neither of the gases change the colour of damp blue litmus paper?

5070_s13_qp_11

MCQ

2013

Paper 1, Variant 1

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Which aqueous reagent liberates ammonia from ammonium nitrate on warming?

5070_s13_qp_11

MCQ

2013

Paper 1, Variant 1

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An aqueous solution of a compound X reacts with • aqueous zinc chloride to form a white precipitate which dissolves when X is in excess, • aluminium sulfate solution to form a white precipitate which is insoluble when X is in excess. What is the identity of X?

5070_s13_qp_11

MCQ

2013

Paper 1, Variant 1

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Which compound, when mixed with aqueous barium nitrate, does not form a white precipitate?

5070_s13_qp_12

MCQ

2013

Paper 1, Variant 2

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Gas Z is to be separated from a mixture of gases X, Y and Z by the apparatus shown...

5070_s13_qp_12

MCQ

2013

Paper 1, Variant 2

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Questions Discovered

174