Lesson 3.1.4
3.1.4 Qualitative analysis Quiz: OCR Chemistry, Unit 2
20 questions
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Lesson 3.1.4, Qualitative analysis: 20 multiple choice questions for the OCR Chemistry (H432), Unit 2: Periodic table and energy, written with Revision Ninja.
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The 20 questions
-
Which reagent is added to test for the presence of carbonate ions?
- Aqueous silver nitrate
- Dilute acid
- Warm sodium hydroxide
- Aqueous barium chloride
-
Which reagent is used to test for sulfate ions in solution?
- Aqueous sodium hydroxide
- Dilute hydrochloric acid
- Aqueous silver nitrate
- Aqueous barium chloride
-
What is the correct sequence when testing an unknown solution for anions?
- Halide, sulfate, carbonate
- Sulfate, carbonate, halide
- Carbonate, sulfate, halide
- Carbonate, halide, sulfate
-
Why must carbonate ions be tested before testing for sulfate ions?
- Barium carbonate precipitates
- Sulfate decomposes quickly
- Silver sulfate precipitates
- Acid destroys carbonate
-
Which reagent and condition are used to test for ammonium ions?
- Warm silver nitrate
- Cold hydrochloric acid
- Cold barium chloride
- Warm sodium hydroxide
-
Which precipitate forms when silver ions are added to chloride ions?
- AgBr, a white precipitate
- AgI, a yellow precipitate
- AgCl, a cream precipitate
- AgCl, a white precipitate
-
A solution gives a white precipitate with Ba2+ and effervesces with dilute acid. Which ion is most likely present?
- Sulfate
- Bromide
- Chloride
- Carbonate
-
Why is dilute nitric acid added before testing for halide ions with silver nitrate?
- Removes nitrate ions
- Removes carbonate ions
- Acidifies halide ions
- Dissolves silver chloride
-
A halide solution forms a yellow precipitate with silver nitrate that is insoluble in dilute ammonia. Which ion is present?
- Bromide, Br-
- Iodide, I-
- Chloride, Cl-
- Nitrate, NO3-
-
A white barium precipitate dissolves in dilute acid with effervescence. Which anion was present?
- Carbonate
- Sulfate
- Chloride
- Nitrate
-
What gas is produced when a carbonate reacts with dilute acid?
- Carbon dioxide
- Hydrogen
- Oxygen
- Ammonia
-
Which cation is identified by warming with aqueous NaOH to release a gas?
- Na+
- NH4+
- Ca2+
- K+
-
Which anion interferes with the test for sulfate ions by forming an insoluble barium precipitate?
- Bromide
- Chloride
- Carbonate
- Nitrate
-
What mass of BaSO4 (Mr = 233.4) forms from 0.0100 mol of Na2SO4?
- 23.3 g
- 4.67 g
- 0.233 g
- 2.33 g
-
What volume of CO2 at RTP is produced from 0.0250 mol of carbonate ions reacting with excess acid?
- 2.40 dm3
- 1.04 dm3
- 0.600 dm3
- 0.0250 dm3
-
How many moles of CO2 form when 0.100 mol of HCl reacts completely with excess CaCO3?
- 0.100 mol
- 0.200 mol
- 0.0250 mol
- 0.0500 mol
-
What is observed when aqueous barium ions are added to separate solutions of sulfate and carbonate ions?
- Two white precipitates
- One white precipitate
- Two cream precipitates
- Effervescence in both
-
What is the formula of the white precipitate formed when Ba2+ reacts with SO4 2-?
- BaS
- Ba(SO4)2
- BaSO4
- BaSO3
-
What confirms a silver halide precipitate is silver bromide rather than silver chloride?
- Concentrated ammonia
- Water solubility
- Dilute ammonia
- Concentrated hydrochloric acid
-
Which group of ions is identified by adding aqueous silver nitrate following acidification with dilute nitric acid?
- Ammonium ions
- Sulfate ions
- Halide ions
- Carbonate ions
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