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Question
12. Which of the following is an inert gas?
12. Which of the following is an inert gas?
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Solution
The correct option is D Both (A) and (C)
Explanation for correct option:
Options (A) and (C)
Characteristics of inert gases:
- They are part of the Periodic Table's 18th group. He, Ne, Ar, Kr, Xe, and Rn, for example.
- All inert gases, with the exception of Rn, are present in the atmosphere.
- Argon is utilised in arc welding and in the production of electric lamps.
- Helium is light and non-flammable, making it ideal for use in balloons, weather indicators, and other applications.
- In discharge tube glow lights, neon is employed.
Explanation for incorrect option:
(B) Hydrogen is not an inert gas as it does not possess fully filled valence shell electrons. So, it is not the correct answer.
Conclusion: Thus, option (D) is the correct answer.
Both (A) and (C)
Explanation for correct option:
Options (A) and (C)
Characteristics of inert gases:
- They are part of the Periodic Table's 18th group. He, Ne, Ar, Kr, Xe, and Rn, for example.
- All inert gases, with the exception of Rn, are present in the atmosphere.
- Argon is utilised in arc welding and in the production of electric lamps.
- Helium is light and non-flammable, making it ideal for use in balloons, weather indicators, and other applications.
- In discharge tube glow lights, neon is employed.
Explanation for incorrect option:
(B) Hydrogen is not an inert gas as it does not possess fully filled valence shell electrons. So, it is not the correct answer.
Conclusion: Thus, option (D) is the correct answer.
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