DP IB Chemistry: HL

Topic Questions

IBChemistry: HLDPTopic Questions14. Chemical Bonding & Structure (HL only)14.2 Further Aspects of Bonding

Syllabus Edition

First teaching 2014

Last exams 2024

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14.2 Further Aspects of Bonding

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1
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Which compound contains delocalised electrons?

  • Cyclohexane, C6H12

  • Cyclohexene, C6H10

  • Benzene, C6H6

  • Cyclohexanol, C6H11OH

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2
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Which structure does not show resonance?

  • Carbonate ion, CO32-

  • Hydroxide ion, OH-

  • Ethanoate ion, CH3COO-

  • Nitrate ion, NO3-

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3
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Which of the following cannot catalyse the decomposition of ozone, O3, to oxygen?

  • Cl

  • NO

  • O

  • CCl4

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4
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Which is the correct description of how an sp2 orbital is formed?

  • One s-orbital mixes with three p-orbitals

  • Two s-orbitals mixes with two p-orbitals

  • One s-orbital mixes with two p-orbitals

  • One s-orbital mixes with one p-orbital

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5
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The structure of glycine is shown below:

glycine-structure-ib-hl-mcq-14-2-e-q5

What is the correct number of sp2 and sp3 hybridized atoms in glycine?

  Number of sp2 hybridised atoms Number of sp3 hybridised atoms
A. 8 2
B. 2 8
C. 3 2
D. 2 3

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1
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Which species can be represented with only one Lewis structure?

  • H2PO4-

  • O3

  • CH3COCH3

  • 1,3 cyclohexadiene

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2
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In which group do both compounds contain delocalised electrons?

  • K2CO3 and cyclohexene, C6H10

  • KOH and methybenzene, C7H8

  • KHCO3 and buta-1,3-diene, C4H6

  • Methanol and sodium methanoate, HCOONa

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3
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Which of the following are intermediate species in the catalytic depletion of ozone?

I.   ClO•

II.  NO•

III. NO2•

  • I and II only

  • I and III only

  • II only

  • I, II and III

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4
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Which is not a correct statement about sp3 hybridised carbons?

  • They can form sigma or pi bonds

  • They have the electron arrangement 1s22s12p3

  • They have four bonding orbitals of equal energy

  • The bonding orbitals have bevelled 1 fourth s character and bevelled 3 over 4 p character

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5
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The structure of the painkiller paracetamol, often known as acetaminophen, is shown below:

paracetamol-structure-ib-hl-mcq-14-2-h-q5

Which of the following is not present in the structure?

  • 5 lone pairs

  • 7 atoms with bond angles of 120o around them

  • 8 atoms with sp2 hybrid orbitals

  • 16 sigma (σ) bonds

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11 mark

Which species contain delocalised electrons?


q1_14-2_ib_hl_medium_mcq

  • I and II only

  • I and III only

  • II and III only 

  • I, II and III

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21 mark

Which combination describes the PH4+ ion?

 

Molecular geometry

Central atom hybridisation

A

Tetrahedral

sp3

B

Square planar

sp3

C

Tetrahedral

sp2

D

Square planar

sp2

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31 mark

Which statement is correct?

  • O3 bond dissociation occurs at a longer wavelength of light than O2 bond dissociation.

  • O3 bond dissociation occurs at a higher energy than O2 bond dissociation.

  • O3 bond lengths are shorter than O2 bond lengths.

  • O3 bond dissociation occurs at a higher frequency of light than O2 bond dissociation.

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41 mark

What is the hybridisation of carbon and oxygen in methanol?

q4_14-2_ib_hl_medium_mcq

 

Hybridisation of C

Hybridisation of O

A

sp2

sp2

B

sp2

sp

C

sp

sp2

D

sp3

sp3

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51 mark

Which species have delocalised π electrons? 

  1.   CH3COCH3
  2.   NO2-
  3.   CO32-

  • I and II only 

  • I and III only 

  • II and III only

  • I, II and III

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