TMA1 CHM303 Inorganic chemistry

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

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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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