Multiple Choice Quiz

Multiple Choice Quiz

Multiple Choice Quiz


1		What is the proper Lewis structure of HNO₃?
			A)
			B)
			C)
			D)


2		How many lone pairs of electrons will be present in the following molecule? CH₃–N=N=N
			A)	0
			B)	1
			C)	2
			D)	3


3		In the nitrate ion (NO₃^-), what is the charge on nitrogen? All electrons are shown.
			A)	No charge
			B)	- 1
			C)	+ 1
			D)	+ 2


4		The best Lewis structure for ethyne (C₂H₂; commonly called “acetylene”) has
			A)	2 single bonds, 1 triple bond, and 1 lone pair.
			B)	2 double bonds and 2 lone pairs.
			C)	2 single bonds, 1 triple bond, and no lone pairs.
			D)	2 single bonds, 1 double bond, and 2 lone pairs.


5		What is the formal charge (FC) of each atom in the following molecule? NH₄⁺
			A)	FC Hydrogens: 0 FC Nitrogen: 0
			B)	FC Hydrogens: 0 FC Nitrogen: -1
			C)	FC Hydrogens: 0 FC Nitrogen: +2
			D)	FC Hydrogens: 0 FC Nitrogen: +1


6		What is the formal charge (FC) of each atom in the following molecule? BH₄^-
			A)	FC Boron: 0 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0 FC Hydrogen₄: 0
			B)	FC Boron: 0 FC Hydrogen₁: +1 FC Hydrogen₂: -1 FC Hydrogen₃: 0 FC Hydrogen₄: 0
			C)	FC Boron: -2 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0 FC Hydrogen₄: 0
			D)	FC Boron: -1 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0 FC Hydrogen₄: 0


7		What is the formal charge (FC) of each atom in the following molecule?
			A)	FC Carbon: +1 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0
			B)	FC Carbon: 0 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0
			C)	FC Carbon: -2 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0
			D)	FC Carbon: -1 FC Hydrogen₁: 0 FC Hydrogen₂: 0 FC Hydrogen₃: 0


8		How many total resonance structures can be drawn for the following anion (include those without separation of charge)?
			A)	1
			B)	2
			C)	3
			D)	4


9		How many resonance structures can be drawn for the following molecule?
			A)	1
			B)	4
			C)	3
			D)	2


10		How many other major contributing resonance structures are possible for the following heterocycle?
			A)	2
			B)	4
			C)	6
			D)	8


11		How many energetically equivalent resonance structures exist for the oxalate dianion?
			A)	1
			B)	2
			C)	3
			D)	4


12		What is the electron configuration for oxygen?
			A)	1s² 2s² 2p⁶
			B)	1s² 2s² 2p⁵
			C)	1s² 2s² 2p⁴
			D)	1s² 2s² 2p³


13		Which of the following compounds does NOT have an octet around the central atom?
			A)	NH₃
			B)	BH₃
			C)	H₃O⁺
			D)	NH₄⁺


14		Which of the following statements about an sp hybridized carbon is FALSE?
			A)	It is divalent.
			B)	It forms bonds that are linear.
			C)	It has two p orbitals.
			D)	It always forms triple bonds to carbon.


15		A p orbital has what shape?
			A)	an oval
			B)	a sphere
			C)	a wedge of pie
			D)	a dumbbell


16		The hybridization of the central carbon in and the bond angle CCN are
			A)	sp², 180°.
			B)	sp, 180°.
			C)	sp², 120°.
			D)	sp³, 109°.


17		What are the hybridizations of carbons 1 and 2 respectively in the following structure?
			A)	sp³ and sp²
			B)	sp² and sp³
			C)	sp³ and sp
			D)	sp² and sp²


18		What are the hybridizations of atoms 1 and 2 respectively in the following structure?
			A)	sp³ and sp²
			B)	sp² and sp³
			C)	sp³ and sp
			D)	sp² and sp²


19		Identify the orbital hybridization at the two indicated carbons in the molecule below.
			A)	C¹: sp; C²: sp
			B)	C¹: sp²; C²: sp²
			C)	C¹: sp; C²: sp²
			D)	C¹: sp²; C²: sp


20		The geometric shape of acetone, (CH₃)₂CO, is best described as
			A)	linear.
			B)	trigonal planar.
			C)	bent.
			D)	tetrahedral.


21		The correct geometry around oxygen in CH₃OCH₃ is
			A)	linear.
			B)	bent.
			C)	tetrahedral.
			D)	trigonal planar


22		Which molecule has the largest dipole moment?
			A)	HCl
			B)	CCl₄
			C)	H₂S
			D)	CO₂


23		Which molecule has the smallest dipole moment?
			A)	CO₂
			B)	CHCl₃
			C)	H₂O
			D)	NH₃


24		Consider the structure with the electron-pushing arrow: Which of the following statements is FALSE?
			A)	The bond between the tertiary carbon and bromine is breaking.
			B)	The products will be a carbon cation and bromine anion.
			C)	This process is called homolytic cleavage.
			D)	The C–Br bonding electrons become a lone pair on the bromine.


25		What is the product of the curved arrow mechanism shown below?
			A)
			B)	No reaction.
			C)
			D)


26		In this reaction, HNO₃ + H₂SO₄ → HSO₄^– + H₂NO₃⁺ a curved arrow should point
			A)	from HNO₃ to H₂SO₄.
			B)	from H₂SO₄ to HNO₃.
			C)	from HSO₄^– to H₂NO₃⁺.
			D)	from H₂NO₃⁺ to HSO₄^–.


27		For the protonation of acetone, the correct curved arrow mechanism is
			A)
			B)
			C)
			D)

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