Noble Gases (Chemistry) Questions:
Which mineral was used in the isolation of radium?
(a) Lime stone
(b) Pitch blende
(c) Rutile
(d) Haematite
Which of the following is monoatomic?
(a) Nitrogen
(b) Fluorine
(c) Neon
(d) Oxygen
The oxidation number of xenon in XeOF2 is
(a) Zero
(b) 2
(c) 4
(d) 3
Gradual addition of electronic shells in the noble gases causes a decrease in their
(a) Ionization energy
(b) Atomic radius
(c) Boiling point
(d) Density
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Which of the following is most polarized?
(a) Kr
(b) He
(c) Ar
(d) Xe
Helium is added to the oxygen supply used by deep sea divers because
(a) It is less soluble in blood than nitrogen at high pressure
(b) It is lighter than nitrogen
(c) It is readily miscible with oxygen
(d) It is less poisonous than nitrogen
Which of the following noble gas does not have an octet of electrons in its outermost shell?
(a) Neon
(b) Radon
(c) Argon
(d) Helium
Which inert gas has the highest boiling point?
(a) Xe
(b) Ar
(c) Kr
(d) He
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Nuclear fusion produces
(a) Argon
(b) Deuterium
(c) Helium
(d) Krypton
Which is the lightest gas?
(a) Hydrogen
(b) Oxygen
(c) Helium
(d) Nitrogen
The low chemical reactivity of the rare gases can be attributed to their
(a) Being non-metals
(b) Having high ionization energies
(c) Being gases
(d) Found in nature in small quantities
Among the fluorides below, the one which does not exist is
(a) XeF4
(b) HeF4
(c) SF4
(d) CF4
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Which of the following statements is not correct for a noble gas?
(a) Ar is used in electric bulbs
(b) Kr is obtained during radioactive disintegration
(c) Half the life of Rn is only 3.8 days
(d) He is used in producing very low temperature
Which of the following is an inert gas?
(a) H2
(b) O2
(c) N2
(d) Argon
The percentage of Ar in the air is about
(a) 1%
(b) 2%
(c) 3%
(d) 4%
The last orbit of argon would have electrons:
(a) 6
(b) 2
(c) 18
(d) 8
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The valency of inert gases is:
(a) 5
(b) 1
(c) 0
Which of the following has zero valency?
(a) Sodium
(b) Beryllium
(c) Aluminum
(d) Krypton
Fluorine forms chemical compounds with
(a) He
(b) Ne
(c) Ar
(d) Xe
The color discharge tubes in the advertisement mainly contain
(a) Argon
(b) Neon
(c) Helium
(d) Xenon
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Helium was discovered by?
(a) Crooks
(b) Rutherford
(c) Frankland and Lockyer
(d) Dorn
The least chemical activity is shown by
(a) Nitrogen
(b) Argon
(c) Methane
(d) Ammonia
Which of the following exhibits the weakest intermolecular forces?
(a) He
(b) HCl
(c) NH3
(d) H2O
The forces acting between noble gas atoms are
(a) Vander Waals forces
(b) Ion-dipole forces
(c) London dispersion forces
(d) Magnetic forces
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The inert gases are
(a) Polyatomic
(b) Triatomic
(c) Diatomic
(d) Monoatomic
Noble gases do not react with other elements because
(a) They have completely paired up and stable electron shells
(b) The sizes of their atoms are very small
(c) Are not found in abundance
(d) Are monoatomic
Which of the following is formed by Xenon?
(a) XeF3
(b) XeF4
(c) XeF5
(d) XeF6
Every inert gas atom
(a) Has a saturated outermost shell
(b) Has one electron in outermost shell
(c) Has eight electrons in outermost shell
(d) Has two electrons in outermost shell
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Which of the following is the correct sequence of the noble gases in their group in the periodic table?
(a) Ar, He, Kr, Ne, Rn, Xe
(b) He, Ar, Ne, Kr, Xe, Rn
(c) He, Ne, Ar, Kr, Xe, Rn
(d) He, Ne, Kr, Ar, Xe, Rn
Monazite is the source of
(a) He
(b) Kr
(c) Ar
(d) Ne
Who among the following first prepared a stable compound of noble gas?
(a) Rutherford
(b) Rayleigh
(c) Ramsay
(d) Neil Bartlett
Argon was discovered by
(a) Rayleigh
(b) Frakland and Lockyer
(c) Jansen
(d) Ramsay
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Which of the following fluorides of Xenon is impossible?
(a) XeF6
(b) XrF4
(c) XeF3
(d) XeF2
In XeF2, XeF4, XeF6 the number of lone pairs on Xe is respectively
(a) 2, 3, 1
(b) 1, 2, 3
(c) 4, 1, 2
(d) 3, 2, 1
The last member of inert gas elements is
(a) Helium
(b) Neon
(c) Argon
(d) Radon
Deep sea divers used to respirate is a mixture of
(a) Oxygen and argon
(b) Oxygen and helium
(c) Oxygen and nitrogen
(d) Oxygen and hydrogen
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XeF2 molecule is
(a) Square planer
(b) Trigonal bipyramidal
(c) Trigonal planer
(d) Linear
The noble gas which forms the maximum number of compounds is
(a) Ar
(b) He
(c) Xe
(d) Ne
Which of the following gases is called rare gas?
(a) Ne
(b) He
(c) Kr
(d) All of these
Noble gases are a group of elements which exhibit very
(a) High chemical activity
(b) Low chemical activity
(c) Minimum electronegativity
(d) Much paramagnetic properties
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Which one of the following noble gases is the least polarizable?
(a) Xe
(b) Ar
(c) Ne
(d) He
Which of the following gases exists more abundantly in nature than the others?
(a) Helium
(b) Neon
(c) Argon
(d) Krypton
Which one of the following statements regarding helium is incorrect?
(a) It is used to produce and sustain powerful superconducting magnets.
(b) It is used as a cryogenic agent for carrying out experiments at low temperatures.
(c) It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable.
(d) It is used in gas-cooled nuclear reactors.
Which one of the following noble gases is not found in the atmosphere?
(a) Rn
(b) Kr
(c) Ne
(d) Ar
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Which noble gas is most soluble in water?
(a) He
(b) Ar
(c) Ne
(d) Xe
Which of the following inert gas liquifies easily?
(a) Kr
(b) He
(c) Ne
(d) Ar
