Question 1. Noble gas clathrate are formed by_____?
A. Van der waal interaction between noble gas atom and crystal lattice of certain compound
B. Chemical reaction between noble gas atom
C. Trapping of noble gas atom in cavities
D. Precipitation
Answer is C. Trapping of noble gas atom in cavities
Question 2. Valence bond theory is inadequate in explaining the structure or shape of XeF2 because _____?
A. The 5d orbitals of XE appears to be too large and too high in energy to participate in hybridization.
B. The 5d orbitals of XE appears to be too large and too high in energy to participate in hybridization.
C. The 3d orbitals of XE appears to be too large and too high in energy to participate in hybridization.
D. The 5d orbitals of XE appears to be too large and too high in energy to participate in hybridization.
Answer is A. The 5d orbitals of XE appears to be too large and too high in energy to participate in hybridization.
Question 3. Hydrogen can attain electronic configuration of noble gas by______?
A. Election transfer
B. By sharing it electron and accepting a part of an electron from an atom
C. By bond formation
D. By electron loss
Answer is B. By sharing it electron and accepting a part of an electron from an atom
Question 4. Fluorides of xenon reacts with hydrogen forming?
A. HF + XE
B. HF2 + Xe2
C. HF + Xe2
D. H2f + XE
Answer is A. HF + XE
Question 5. The group 1A elements are highly electropositive because _______?
A. The ionise by election loss
B. Their S election is very shielded by the inner elections
C. The outer electron have high ionization energy
D. They want to attend the stable configuration of noble gas
Answer is B. Their S election is very shielded by the inner elections
Question 6. ___ will not form when they react the erect li with fluorine?
A. XeF3
B. XeF6
C. XeF4
D. XeF2
Answers is A. XeF3
Question 7. the representative elements are made up of s and p block element of the periodic table because______?
A. their valence S shell is filled up
B. their valence shell is either s or p orbital
C. Their valence s or p shell is involved in bonding
D. the valence s or p orbital is partially filled up
Answer is A. their valence S shell is filled up
Question 8. What is the shape/structure of xef2 molecule?
A. Tetrahedral
B. Linear
C. Trigonal
D. Trigonal bipyramidal
Answers B. Linear
Question 9. van der waal attraction between molecules or atom of noble gas increase with _____?
A. Increase in the number of electron per molecules or atom
B. decrease in the number of electron per molecule or atom
C. Increase in ionization energies of molecule or atom
D. Decrease in ionization energy of molecules or atom
Answer is A. Increase in the number of electron per molecules or atom
Question 10. All of the following are main source of hydrogen except?
A. Water
B. Volcanic gas
C. Petroleum
D. Natural gas
Answer is B. Volcanic gas
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