Inert Gases MCQs [Chemistry]

1. What kind of gases are Zero group elements?

(A) Noble gases

(B) Rare gases

(C) Inert gases

(D) All of A, B, and C

2. Which of the mentioned is helpful and used in radiotherapy?

(A) Kr

(B) Rn

(C) Xe

(D) He

3. Which one of the following is not true?

(A) Ar is helpful and used in electric bulbs

(B) Xe forms XeOF4

(C) Boiling point of He is lowest among all noble gases

(D) Kr is obtained during radioactive decay

4. Xenon reacts best with

(A) The most electronegative elements

(B) The most electropositive elements

(C) The hydrogen halides

(D) Non-metals

5. The noble gases are found in the atmosphere to the extent of about some percent by volume

(A) 2.4%

(B) 3.5%

(C) 1.0%

(D) 2.0%

6. ________ are the inert gases Ar, Kr and Xe form solid compounds with certain organic molecules under pressure.

(A) All of A, B, and C

(B) Hydrates

(C) Halides

(D) Clathrates

7. Xenon difluoride is obtained by irradiating a mixture of xenon and fluorine with light from a high pressure

(A) Xenon arc

(B) Tungsten arc

(C) Mercury arc

(D) None of A, B, and C

8. XeF₂ is obtained when a mixture of Xenon and fluorine in the ratio is heated in a nickel vessel at 400°C

(A) 1:30

(B) 2:4

(C) 5:1

(D) 1:5

9. Which is one of the best fluorinating agents?

(A) XeF₄

(B) XeF₆

(C) XeF₂

(D) None of A, B, and C

10. Which of the mentioned noble gases is helpful and used in

(A) Xenon

(B) Krypton

(C) Radon

(D) Helium

11. What is the geometry of XeF₂?

(A) Square planar

(B) Linear

(C) Triangular planar

(D) Trigonal bipyramidal

12. The states of hybridization of Xe in XeF₄ and XeF₆ are ______ , _______ .

(A) sp³d³, sp³d²

(B) None of A, B, and C

(C) sp³d³, sp³d²

(D) sp³d², sp³d²

13. Zero group of the periodic table consists of how many elements?

(A) Six elements

(B) Five elements

(C) Eight elements

(D) Four elements

14. Argon is helpful and used in filling of

(A) Fluorescent tubes

(B) Luminous tube

(C) Discharge tubes

(D) None of A, B, and C

15. Which of the mentioned noble gases is helpful and used in Geiger counter to detect radioactivity?

(A) Kr

(B) Ne

(C) He

(D) Ar

16. Which of the mentioned noble gases is helpful and used in TV sets and sound movies to give ready response to electrical potential?

(A) Ne

(B) Kr

(C) Ar

(D) He

17. Helium is helpful and used for

(A) Pressuring agent in rockets

(B) Filling electrical transformer

(C) All of A, B, and C

(D) The preservation of food

18. For the respiration of sea divers, mixture is helpful and used

(A) Kr & O₂

(B) Ar & O₂

(C) Ne & O₂

(D) He & O₂

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

(A) He

(B) Ne

(C) Ar

(D) Xe

20. Which one of the following noble gases is obtained by radioactive disintegration?

(A) Kr

(B) Br

(C) Rn

(D) Xe

21. Which of the mentioned statements is not true about noble gases?

(A) They do not form any chemical compounds

(B) Their electron affinities are nearly zero

(C) Their ionization energies are very high

(D) They are not easily liquefied

22. What is the Helium content in the atmosphere by volume?

(A) 0.0005%

(B) 0.0020%

(C) 0.0001%

(D) 0.00002%

23. Which noble gas does not obey the octet rule?

(A) Rn

(B) Xe

(C) Kr

(D) He

24. ______ are the inert gases Ar, Kr and Xe form compounds with water at low temperature and high pressure.

(A) Hydrates

(B) Clathrates

(C) Halides

(D) All of A, B, and C

25. Compounds formed when noble gases get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called

(A) Hydrates

(B) Clathrates

(C) Interstitial compounds

(D) Picrates

26. The noble gas helpful and used for treatment of cancer

(A) Helium

(B) Argon

(C) Krypton

(D) Radon

27. Helium-oxygen mixture is helpful and used by deep sea divers in preference to nitrogen-oxygen mixture, because

(A) Nitrogen is much less soluble in blood than helium

(B) Helium is much less soluble in blood than nitrogen

(C) Due to high pressure deep under the sea, nitrogen and oxygen react to give poisonous nitric oxide

(D) Nitrogen is highly soluble in water

28. Helium is helpful and used in weather balloons and airships instead of H₂, because it is

(A) Lighter than hydrogen

(B) Incombustible

(C) More abundant than hydrogen

(D) Radioactive

29. What is the noble gas which was discovered first in the sun and then on the earth?

(A) Ne

(B) Xe

(C) Ar

(D) He

30. Xe reacts directly with which of the following?

(A) O₂

(B) Cl₂

(C) F₂

(D) Br₂

31. Which of the mentioned is not known?

(A) KrF₆

(B) XeF₆

(C) XeO₃

(D) KrF₂

32. Helides are compounds of which noble gas?

(A) He

(B) Xe

(C) Kr

(D) Ne

33. Which of the mentioned noble gases is more reactive?

(A) Kr

(B) Rn

(C) Kr

(D) Xe

34. In XeF₂ molecules, Xe atom undergoes hybridization

(A) sp³d

(B) sp²

(C) sp³

(D) spd

35. Which of the mentioned minerals contain traces of He and Ne gases?

(A) Monazite

(B) Bitchblende

(C) None of A, B, and C

(D) Cleveite

36. Which of the mentioned noble gases is helpful and used in filling luminous tubes?

(A) Helium

(B) Xenon

(C) Radon

(D) Krypton

37. The ‘shape’ of molecule, XeF₆ is

(A) Regular octahedral

(B) Distorted octahedral

(C) Pentagonal bipyramidal

(D) Square planar

38. Which type of hybridization of Xe is involved in XeOF₄ molecule?

(A) sp³

(B) sp³d³

(C) sp³d

(D) sp³d₂

39. Select the false statement for XeF₄.

(A) It has octahedral structure (or geometry)

(B) It is helpful and used as fluorinating agent

(C) XeF₄ disproportionates violently with water

(D) It oxidizes I⁻ to I₂

40. Noble gases are helpful and used in discharge tubes to give different colours. Reddish-orange glow is due to

(A) Ne

(B) Ar

(C) Xe

(D) Kr