Chemical Bonding and Molecular Structure MCQs Question and Answer in Engineering Chemistry

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The incorrect statement for solid sodium chlo;ride is that

A) both sodium and chloride ions adopt inert gas configuration B) the conduction band is full C) the conduction band is empty D) the valence band is full

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Answer & Solution

Answer: Option C

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The xenon compounds that are isostructural with $${\bf{IBr}}_2^ - $$ and $${\bf{BrO}}_3^ - $$ respectively are

A) linear XeF₂ and pyramidal XeO₃ B) bent XeF₂ and pyramidal XeO₃ C) bent XeF₂ and planar XeO₃ D) linear XeF₂ and tetrahedral XeO₃

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Answer & Solution

Answer: Option A

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CaTiO₃ has a perovskite crystal structure. The coordination number of titanium in CaTiO₃ is

A) 9 B) 6 C) 3 D) 12

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Answer & Solution

Answer: Option B

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According to VSEPR theory, the shapes of [SF₂Cl]⁺ and [S₂O₄]^2- should be

A) trigonal planar for [S₂O₄]^2- and trigonal pyramidal for [SF₂Cl]⁺ B) both trigonal planar C) trigonal pyramidal for [S₂O₄]^2- and trigonal planar for [SF₂Cl]⁺ D) both trigonal pyramidal

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Answer & Solution

Answer: Option A

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Fe₃O₄ and Co₃O₄ are metal oxides having spinel structure. Considering their CFSFs, the correct statement regarding their structure is

A) both have normal spinel structure B) both have inverse spinel structure C) Fe₃O₄ has normal and Co₃O₄ has inverse spinel structure D) Fe₃O₄ has inverse and Co₃O₄ has normal spinel structure

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Answer & Solution

Answer: Option D

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The band structure in an n-type semiconductor is
Chemical Bonding and Molecular Structure mcq question image

A) I B) II C) III D) IV

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Answer & Solution

Answer: Option A

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[XeO₆]^4- is octahedral whereas XeF₆ is a disordered one, because

A) fluorine is more electronegative than oxygen B) Xe has a lone pair in XeF₆ C) XeF₆ is neutral whereas [XeO₆]^4- is anionic D) Xe-F bond has more ionic characters

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Answer & Solution

Answer: Option B

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Band theory predicts that magnesium is an insulator. However, in practice it acts as a conductor due to

A) presence of filled 3s - orbital B) overlap of filled 2p and filled 3s - orbital C) overlap of filled 3s and empty 3p - orbital D) presence of unfilled 3p - orbital

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Answer & Solution

Answer: Option C

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Which of the following statements about the molecule NOCl is correct?

A) It has a linear structure B) It belongs to the point group C_s C) It does not have a dipole moment D) It is a chiral molecule

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Answer & Solution

Answer: Option B

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Among the following, the isoelectronic and isostructural pair is

A) CO₂ and SO₂ B) SO₃ and SeO₃ C) $${\text{NO}}_2^ + $$ and TeO₂ D) $${\text{SiO}}_4^{4 - }$$ and $${\text{PO}}_4^{3 - }$$

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Answer & Solution

Answer: Option D

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