Identifying Gases based on Chemical Reactions
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Questions and Answers

Which gas is responsible for rekindling a glowing splinter?

  • H2S
  • CO2
  • H2O
  • O2 (correct)

    • What color does Cl2 turn moist blue litmus paper?

  • Green
  • Red
  • Blue Black (correct)
  • Yellow

    • Which acid gas turns acidified potassium permanganate solution from pink to colorless?

  • SO2 (correct)
  • NO2
  • CO2
  • HCl

    • What happens when acidic gases are passed through lime water?

    <p>Turns it milky</p> Signup and view all the answers

    Which gas forms a white ppt. with AgNO3 and the ppt. is soluble in NH4OH but insoluble in dilute acids?

    <p>NH3</p> Signup and view all the answers

    Which cation forms a chalky white ppt. with NaOH but is soluble to form a colorless solution?

    <p>Pb2+</p> Signup and view all the answers

    What color precipitate forms when Fe3+ ions are present in a solution?

    <p>Chalky white</p> Signup and view all the answers

    When lead acetate paper is exposed to a gas after adding dilute H2SO4, which color change is observed?

    <p>Turns silvery black</p> Signup and view all the answers

    Which ion forms a dense white fume with ammonia when reacted with MnO2 and concentrated H2SO4?

    <p>Cl-</p> Signup and view all the answers

    What is the color of the flame when a potassium ion is tested in a flame test?

    <p>Lilac</p> Signup and view all the answers

    What gas is evolved when dilute H2SO4 is added to a sulfide ion and heated?

    <p>Rotten egg smelling gas</p> Signup and view all the answers

    When ammonium ions are present and alkali is added and heated, what gas is evolved?

    <p>Pungent smelling gas</p> Signup and view all the answers

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