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CSEE (Form 4) Reactions in Aqueous Solution — practice questions

Explore 28 free Reactions in Aqueous Solution questions in CSEE (Form 4) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Reactions in Aqueous Solution questions and exercises with answers

Showing questions 1–28 of 28.

What is a substance called if it contains free ions and conducts an electric current?Read the answer and worked solution →Two clear solutions are mixed and a solid suddenly appears. What is that solid called?Read the answer and worked solution →A gas given off by a reaction is bubbled through limewater and the limewater turns milky. Which gas is it?Read the answer and worked solution →What is exchanged between the species taking part in a redox reaction?Read the answer and worked solution →Match each scientist to their contributionRead the answer and worked solution →Ionic or covalent?Read the answer and worked solution →Complete the driver of bond formationRead the answer and worked solution →Single, double and triple bondsRead the answer and worked solution →True or false: Lewis structuresRead the answer and worked solution →Complete the definition of resonanceRead the answer and worked solution →Tap every bond parameter the chapter namesRead the answer and worked solution →True or false: ionic solidsRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Bonded pair or lone pair?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why resonance is neededRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: what bond parameters affectRead the answer and worked solution →Bond parameters in useRead the answer and worked solution →Which parameter answers this?Read the answer and worked solution →True or false: resonanceRead the answer and worked solution →Order the steps: draw a Lewis structureRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reason: structureRead the answer and worked solution →Flip and pair: parameter with what it measuresRead the answer and worked solution →

Worked practice questions

What is a substance called if it contains free ions and conducts an electric current?

  1. An insulator
  2. A precipitate
  3. A non-metal
  4. An electrolyte
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Correct answer: D. An electrolyte

1. A current needs charged particles that are free to move. 2. An electrolyte is a substance that contains free ions and behaves as an electrically conductive medium. 3. Sugar dissolved in water forms no ions, so it does not conduct and is a non-electrolyte. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 18: Reactions in aqueous solution_

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Two clear solutions are mixed and a solid suddenly appears. What is that solid called?

  1. A precipitate
  2. An electrolyte
  3. A suspension
  4. A distillate
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Correct answer: A. A precipitate

1. Ions in solution can meet and form a product that will not dissolve. 2. A precipitate is the solid that forms in a solution during a chemical reaction. 3. Solubility rules tell you in advance which combination of ions will do this. 4. A reaction of this kind is called a precipitation reaction. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 18: Reactions in aqueous solution_

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A gas given off by a reaction is bubbled through limewater and the limewater turns milky. Which gas is it?

  1. Carbon dioxide
  2. Hydrogen gas
  3. Oxygen gas
  4. Nitrogen gas
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Correct answer: A. Carbon dioxide

1. Limewater is an aqueous solution of calcium hydroxide. 2. Passing a gas through it is a standard test for one gas in particular. 3. If the solution becomes milky, the gas is carbon dioxide. 4. The milkiness comes from an insoluble solid forming in the liquid. 5. That solid is calcium carbonate, which does not dissolve and clouds the water. 6. Treating a dry salt with acid and getting this gas is a positive test for a carbonate. 7. Hydrogen is tested with a lit splint instead, so limewater would tell you nothing about it. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 18: Reactions in aqueous solution_

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