Chemical Reaction: Sulphur Dioxide and Acidified Potassium Dichromate

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Questions and Answers

What is the main characteristic of the chemical reaction between sulphuric acid and barium chloride solution?

  • No observable change
  • Formation of a white precipitate (correct)
  • Change in color from purple to colorless
  • Formation of a yellow precipitate

What is the purpose of adding lemon juice to the potassium permanganate solution?

  • To neutralize the solution
  • To change the color of the solution (correct)
  • To form a precipitate
  • To increase the temperature of the reaction

What is the purpose of mixing lead nitrate and potassium iodide solutions?

  • To increase the temperature of the reaction
  • To change the color of the solution
  • To form a yellow precipitate (correct)
  • To form a white precipitate

What is the effect of adding lemon juice to potassium permanganate solution?

<p>The purple color fades and becomes colorless (B)</p> Signup and view all the answers

Which of the following is an example of a chemical reaction characterized by a change in color?

<p>The reaction between citric acid and potassium permanganate (B)</p> Signup and view all the answers

What is the purpose of performing the reaction between citric acid (from lemon juice) and potassium permanganate solution?

<p>To observe the change in color of the solution (C)</p> Signup and view all the answers

What is the purpose of mixing colourless solutions of lead nitrate and potassium iodide?

<p>To form a yellow precipitate (D)</p> Signup and view all the answers

What is the main characteristic of the chemical reaction between citric acid (from lemon juice) and potassium permanganate solution?

<p>Change in color from purple to colorless (B)</p> Signup and view all the answers

What is the purpose of adding lemon juice (containing citric acid) to potassium permanganate solution?

<p>To change the color of the solution from purple to colorless (C)</p> Signup and view all the answers

What is the main characteristic of the chemical reaction between sulphuric acid and barium chloride solution?

<p>Formation of a white precipitate (B)</p> Signup and view all the answers

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