8.2 Identification of common gases

    Cards (51)

    • Hydrogen gas produces a squeaky pop sound when lit
    • Chlorine gas bleaches damp litmus paper
    • Oxygen is a colorless and odorless gas that supports combustion.

      True
    • Hydrogen is a colorless and odorless gas.

      True
    • Order the chemical tests for identifying common gases based on their observations:
      1️⃣ Hydrogen: Squeaky pop sound when lit
      2️⃣ Oxygen: Relights a glowing splint
      3️⃣ Carbon dioxide: Forms a white precipitate with limewater
      4️⃣ Chlorine: Bleaches damp litmus paper
      5️⃣ Ammonia: Turns damp red litmus paper blue
    • Chlorine gas turns damp litmus paper blue.
      False
    • Arrange the following gases in alphabetical order:
      1️⃣ Ammonia
      2️⃣ Carbon dioxide
      3️⃣ Chlorine
      4️⃣ Hydrogen
      5️⃣ Oxygen
    • Match the gas with its identifying test:
      Oxygen ↔️ Relights a glowing splint
      Hydrogen ↔️ Produces a squeaky pop sound
      Chlorine ↔️ Bleaches damp litmus paper
      Ammonia ↔️ Turns damp red litmus paper blue
    • What is the density of carbon dioxide relative to air?
      Denser than air
    • What happens to damp litmus paper when exposed to chlorine gas?
      It bleaches
    • What is the physical property of chlorine that helps identify it?
      Pungent odor
    • Oxygen gas relights a glowing splint.
      True
    • Ammonia gas turns damp red litmus paper blue.

      True
    • Carbon dioxide is a colorless, odorless gas that is denser than air
    • What is the density of carbon dioxide relative to air?
      Denser than air
    • What happens when a glowing splint is brought to oxygen gas?
      Relights the glowing splint
    • What sound is produced when hydrogen gas is ignited with a lit splint?
      Squeaky pop sound
    • Which gas is the lightest of all gases?
      Hydrogen
    • It is safe to handle toxic gases without personal protective equipment in a well-ventilated area.
      False
    • Oxygen relights a glowing splint
    • Ammonia turns damp red litmus paper blue
    • Match the gas with its chemical test observation:
      Hydrogen ↔️ Squeaky pop sound
      Oxygen ↔️ Relights a glowing splint
      Carbon dioxide ↔️ Forms a white precipitate
      Chlorine ↔️ Bleaches damp litmus paper
    • When handling gases, it is crucial to be aware of their physical properties
    • Carbon dioxide forms a white precipitate when bubbled through limewater.
    • Hydrogen is the lightest of all gases
    • Which gases mentioned in the study material are toxic or corrosive?
      Chlorine and ammonia
    • Steps to identify an unknown gas in a chemistry lab
      1️⃣ Observe its physical properties
      2️⃣ Perform relevant chemical tests
      3️⃣ Confirm its identity
    • Working in a well-ventilated area reduces the risk of hazardous gas buildup.

      True
    • Oxygen relights a glowing splint.
      True
    • Ammonia turns damp red litmus paper blue.

      True
    • Wearing safety goggles is essential when identifying gases in a chemistry lab.

      True
    • Adhering to safety guidelines protects both yourself and others in the lab.

      True
    • What type of PPE should you wear when working with common gases in a lab?
      Safety goggles, gloves, lab coat
    • What are the common gases that can be identified in a chemistry lab?
      Hydrogen, oxygen, carbon dioxide, chlorine, ammonia
    • What does carbon dioxide form when bubbled through limewater?
      White precipitate
    • Which gas is the lightest of all gases?
      Hydrogen
    • What is the color and odor of chlorine gas?
      Greenish-yellow, pungent
    • Hydrogen is the lightest of all gases
    • Carbon dioxide bubbled through limewater forms a white precipitate
    • What happens to damp red litmus paper when exposed to ammonia gas?
      Turns the litmus paper blue
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