Self Assessment A


1	The bond angles in the H₃O⁺ ion are:
		A)	120^o
		B)	90^o, 120^o
		C)	109^o
		D)	90^o
		E)	180^o


2	Which of the following molecules is not planar?
		A)	BCl₃
		B)	ClF₃
		C)	PCl₃
		D)	XeF₄
		E)	All the compounds above are planar.


3	Which of the following has the smallest bond angles?
		A)	CO₂
		B)	SO₂
		C)	SO₃
		D)	SO₄^2-
		E)	The bond angles in each of these substances are the same.


4	Which of the following molecules has a dipole moment?
		A)	H₂
		B)	CO₂
		C)	F₂
		D)	SO₂
		E)	BF₃


5	Determine the hybridization of the central atom in the compound PCl₅.
		A)	sp³d
		B)	sp³
		C)	sp³d²
		D)	sp
		E)	sp²


6	Which of the following molecules has a dipole moment and a central atom with sp³ hybridization?
		A)	CCl₄
		B)	BF₃
		C)	CHCl₃
		D)	BrF₃
		E)	C₂H₄


7	The lone pair of electrons on the sulfur atom in SO₂ is in
		A)	a p orbital.
		B)	an s orbital.
		C)	an sp³ hybrid orbital.
		D)	an sp² hybrid orbital.
		E)	None of the above.


8	What is the bond order for the species O₂^-?
		A)	1
		B)	1.5
		C)	2
		D)	2.5
		E)	None of the above.


9	According to the molecular orbital model, which of the species below is the least stable?
		A)	Li₂
		B)	B₂
		C)	C₂
		D)	O₂
		E)	He₂


10	Which of the following molecules has delocalized molecular orbitals?
		A)	H₂O
		B)	C₆H₆
		C)	C₂H₂
		D)	CH₃OH
		E)	None of the above have delocalized molecular orbitals.

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