Questions: 12. Four different gases are passed through the apparatus shown. Which gas has no effect on either piece of litmus paper? A ammonia B carbon dioxide acid C chlorine (D) hydrogen

12. Four different gases are passed through the apparatus shown. Which gas has no effect on either piece of litmus paper? A ammonia B carbon dioxide acid C chlorine (D) hydrogen
Transcript text: 12. Four different gases are passed through the apparatus shown. Which gas has no effect on either piece of litmus paper? A ammonia B carbon dioxide acid C chlorine (D) hydrogen
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Solution

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Solution Steps

Step 1: Analyze the effect of each gas on litmus paper
  • Ammonia (NH₃): Ammonia is a base and turns damp red litmus paper blue.
  • Carbon dioxide (CO₂): Carbon dioxide is an acidic gas and turns damp blue litmus paper red.
  • Chlorine (Cl₂): Chlorine is an acidic gas and bleaches damp litmus paper (both red and blue), turning it white.
  • Hydrogen (H₂): Hydrogen is a neutral gas and has no effect on either damp red or blue litmus paper.

Final Answer: The correct answer is D. Hydrogen has no effect on litmus paper.

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