Chemistry Multiple Choice Exercises Paper

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Determine the number of sigma (o) and pi (IT) bonds in the molecule shown on the left below.

c—c

c—c c—c

H—C word image 2768 C—H

A) 240 and 7TT

B) 70 and 5Tr

C) 240 and 22TT

D) 70 and 7TT

E) 240 and 5TT

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The skeletal structure of tetracyanoethylene is shown below. Determine the number of sigma (o) and pi (IT) bonds in the molecule.

c c

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A) 80 and 6TT

B) 90 and 6TT

C) 80 and 917

D) 80 and 7TT

E) 90 and 9TT

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In sp2-hybridized orbitals, how many p-orbitals remain to form multiple bonds?

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Which hybrid orbitals overlap in the C – O bond in CBC)?

A) sp2 – s

B) sp2 – sp2

C) sp2 – sp3

D) sp3 – sp

E) sp3 – sp

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Which hydrocarbon has all of its atoms in the same plane?

A) C2H6

B) CH4

C) C2H4

D) C3H4

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a

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Draw

the

Lewis

Stt11CtUte

of

(by

following

the

octet

rule

on

all

atoms)

and

then

determine the hybridization of the central atom.

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A) spa

B) spa

C) sp

D) sp&d2

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word image 2781 Draw the Lewis structure of S03 (with minimized formal charges) and then determine the hybridization of the central atom.

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A) sp3

B) sp4

C) sp

D) sp3d2

E) sp2

Click to draw a new structure

word image 2784 Draw the Lewis structure of XeCb and then determine the hybridization of the central atom.

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A) sp3

B) sp5

C) sp3d

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Click to draw a new structure

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A) will have at least two resonance structures.

B) will have only single bonds in its chemical structure.

C) will be any molecule that contains a double bond.

D) will be any molecule that contains a TT bond.

word image 2789 Which of these molecules have delocalized electrons?

A) C032-

B) C02

C) NF3

D) CH4

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23

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What would be the bond order of the hypothetical molecule Arp

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A) Increase the bond order

B) Decrease the bond order

C) Have no effect on the bond order

D) Weaken the bond

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What is the bond order of H2+?

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Question 18 of 23

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the is considered least stable according to molecular orbital theory?

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B) H2

C) He2

D) Her

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the has a bond order of 2.5 according to molecular orbital theory?

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B) CN

C) NO

D) 02

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the is paramagnetic according to molecular orbital theory?

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Question 21 of 23 word image 2805

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word image 2808 What is the bond order of the polyatomic molecule CN-?

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word image 2810 Draw the Lewis structure of phosphate (P043-) by following the octet rule on all atoms and then determine the hybridization of the central atom.

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C) sp3

D) sp5

E) sp3d

Click to draw a new structure

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Draw the Lewis structure of SA- and then determine the hybridization of the central atom.

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Click to draw a new structure

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