Group-18 P block Noble gases

Group 18 Elements Quiz

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Test your knowledge on the p-block elements of Group 18 (Noble Gases) for JEE and NEET.

1. The general electronic configuration of Group 18 elements is:

• $ns^2 np^5$
• $ns^2 np^6$
• $ns^2 np^4$
• $ns^2$

2. Why are noble gases largely unreactive?

• They have a high electronegativity.
• They have a complete valence shell electronic configuration.
• They have a high electron gain enthalpy.
• They have a small atomic radius.

3. The correct order of increasing boiling points for the noble gases is:

• He < Ne < Ar < Kr < Xe < Rn
• Rn < Xe < Kr < Ar < Ne < He
• Ar < He < Ne < Kr < Xe < Rn
• He < Ne < Ar < Xe < Kr < Rn

4. Which of the following noble gases is used in weather forecasting and meteorological balloons?

• Neon (Ne)
• Helium (He)
• Argon (Ar)
• Xenon (Xe)

5. The first compound of a noble gas was prepared by:

• Pauling
• Neil Bartlett
• Ramsay
• Rutherford

6. Which of the following noble gases is radioactive?

• Xenon (Xe)
• Radon (Rn)
• Krypton (Kr)
• Argon (Ar)

7. The correct order of decreasing ionization enthalpy for the noble gases is:

• He > Ne > Ar > Kr > Xe > Rn
• Rn > Xe > Kr > Ar > Ne > He
• Xe > Kr > Ar > Ne > He > Rn
• Ne > He > Ar > Kr > Xe > Rn

8. Which of the following is an allotrope of a noble gas?

• Xenon difluoride ($XeF_2$)
• Helium hydride (HeH)
• Argon oxide (ArO)
• Noble gases do not form allotropes.

9. The shape of the $XeF_4$ molecule is:

• Tetrahedral
• Square planar
• Trigonal bipyramidal
• Octahedral

10. The hybridization of the central atom in $XeF_6$ is:

• $sp^3d^2$
• $sp^3d^3$
• $sp^3d$
• $sp^3$

11. Which of the following noble gases is the most abundant in the atmosphere?

• Helium (He)
• Neon (Ne)
• Argon (Ar)
• Krypton (Kr)

12. The correct order of decreasing atomic radii for the noble gases is:

• He > Ne > Ar > Kr > Xe > Rn
• Rn > Xe > Kr > Ar > Ne > He
• Ne > He > Ar > Kr > Xe > Rn
• He < Ne < Ar < Kr < Xe < Rn

13. Which of the following noble gases is used in fluorescent bulbs and advertising signs?

• Helium (He)
• Argon (Ar)
• Neon (Ne)
• Krypton (Kr)

14. The existence of noble gas compounds is possible because of:

• High electronegativity.
• Low ionization enthalpy.
• Large atomic size.
• Both B and C.

15. What is the hybridization of the central atom in $XeF_2$?

• $sp^3$
• $sp^3d$
• $sp^3d^2$
• $sp$

16. The bond angle in $XeO_3$ is:

• $109.5^\circ$
• $120^\circ$
• The bond angle is not fixed.
• The molecular geometry is trigonal pyramidal.

17. Which of the following is the most powerful oxidizing agent?

• $XeO_3$
• $XeF_6$
• $XeF_4$
• All have equal oxidizing power.

18. The geometry of the central atom in $XeO_4$ is:

• Trigonal bipyramidal
• Square planar
• Tetrahedral
• Octahedral

19. Which of the following is used as an anesthetic?

• Helium (He)
• Neon (Ne)
• Xenon (Xe)
• Radon (Rn)

20. The noble gas that is most abundant in the universe is:

• Helium (He)
• Argon (Ar)
• Neon (Ne)
• Xenon (Xe)

21. Which noble gas is used in arc welding to provide an inert atmosphere?

• Helium (He)
• Neon (Ne)
• Argon (Ar)
• Krypton (Kr)

22. The shape of the $XeO_3$ molecule is:

• Tetrahedral
• Trigonal planar
• Trigonal pyramidal
• Square pyramidal

23. Which of the following noble gases is used in fillaments of electric bulbs?

• Helium (He)
• Neon (Ne)
• Argon (Ar)
• Xenon (Xe)

24. What is the hybridization of the central atom in $XeO_4$?

• $sp^3$
• $sp^3d$
• $sp^3d^2$
• $dsp^2$

25. The noble gas that is used to treat asthma is:

• Neon (Ne)
• Helium (He)
• Argon (Ar)
• Xenon (Xe)

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