DP IB Chemistry: HL

Topic Questions

IBChemistry: HLDPTopic Questions4. Chemical Bonding & Structure4.1 Ionic & Covalent Bonding

Syllabus Edition

First teaching 2014

Last exams 2024

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4.1 Ionic & Covalent Bonding

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11 mark

Phosphine, PH3, can react with a hydrogen ion, H+, to form the phosphonium ion.

Which type of bond is formed in this reaction?

  • dipole-dipole forces

  • dative covalent bond

  • ionic bond

  • hydrogen bond

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21 mark

Silver and iodine are both shiny crystalline solids.

Which forces exist between neighbouring iodine molecules in solid iodine and particles in solid silver?

 

iodine

silver

A

metallic bonds

covalent bonds

B

ionic bonds

metallic

C

covalent bonds

covalent bonds

D

London dispersion forces

metallic

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31 mark

Below are four solids. Which of these contains more than one kind of bonding?

  • diamond

  • sodium chloride 

  • iron 

  • ice

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41 mark

Which of the following statements about ions and ionic compounds are true? 

  1.   Nitrogen can form a 3- ion
  2.   Potassium can form a cation
  3.   The formula for aluminium chloride is AlCl2

  • I and II only

  • I and III only

  • II and III only 

  • I, II and III

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51 mark

What is the correct formula for ammonium carbonate?

  • NH3CO3

  • NH4CO3

  • (NH4)2CO3

  • (NH4)3CO3

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61 mark

In acidic conditions, ammonia, NH3, reacts with a proton, H+, to form ammonium NH4+.

Using the following key:

 bold times   N electron

cross times   H electron

Which of the following Dot & Cross diagrams correctly illustrate electron movement in this reaction.

q6_4-1_easy_mcq_ib-chemistry-sl

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71 mark

Which crystal structure does not conduct electricity when solid, has a high melting point and can conduct electricity when molten?

  • Giant metallic

  • Giant ionic

  • Macromolecular

  • Simple molecular

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81 mark

Which of these atoms is most electronegative?

  • Cl

  • Mg

  • Br

  • Na

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91 mark

Which of the following compounds is not bonded ionically?

  • CaCO3

  • CH3OH

  • NaOH

  • BaCl2

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101 mark

“Electrostatic attraction between cations and delocalised electrons”

Which of the following types of bonds does the statement best describe?

  • hydrogen

  • ionic

  • dipole-dipole

  • metallic

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111 mark

Which of the following materials only contain one type of bonding?

  • graphite

  • brass

  • ice

  • iodine crystals

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121 mark

Based on their Pauling electronegativity values, which atom is more likely to form a covalent bond with fluorine?

 

atom

Pauling value

 

fluorine

4.0

A

hydrogen

2.2

B

copper

1.9

C

magnesium

1.3

D

potassium

0.8

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11 mark

CHCl3 and Br2 are both liquids at room temperature due to the existence of dipoles.

What dipoles are involved within CHCl3 and Br2?

 

CHCl3

Br2

A

induced dipoles only

induced dipoles only

B

induced dipoles only

induced dipoles and permanent dipoles

C

induced dipoles and permanent dipoles

induced dipoles and permanent dipoles

D

induced dipoles and permanent dipoles

induced dipoles only

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21 mark

What are the correct formulas for the following ions? 

 

Phosphate

Ammonium

Ethanoate

Nitrite

A

PO43-

NH4+

CH3COO+

NO3-

B

PO32-

NH4-

CH3COO-

NO2-

C

PO43-

NH4+

CH3COO-

NO2-

D

PO42-

NH4+

CH3CH2COO-

NO3-

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31 mark

What is the correct structure of the chlorite ion, ClO2- ?q3-4-1_hard_mcq_ib-chemistry-sl

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41 mark

Which of the following statements about 2-chloropropene, CH2C(Cl)CH3 is not correct

  • There are 3 lone pairs in the molecule

  • There are 24 valence electrons in the molecule 

  • The molecule does obey the octet rule

  • The molecule does not obey the octet rule

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51 mark

Which of the following structures do not obey the octet rule?

  1. BeCl2
  2. BF3
  3. H2O

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

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61 mark

The periodic table may be needed to answer this question.

Which is the shortest bond length in the following gases?

  • oxygen-oxygen in oxygen gas, O2

  • carbon-carbon in ethyne gas, C2H2

  • nitrogen-nitrogen in nitrogen gas, N2

  • oxygen-oxygen in ozone gas, O3

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71 mark

Which statement best describes the intramolecular bonding in a carbonate ion, CO32-?

  • Only London forces

  • Electrostatic attraction between pairs of electrons and positively charged nuclei

  • Permanent dipole permanent dipole forces

  • Electrostatic attraction between separate carbonate ions

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81 mark

The number of electrons in the valence shell of elements X and Y are 5 and 7 respectively. What is the formula and type of compound formed from these elements?

  • Covalent, XY3

  • Ionic, XY3

  • Covalent, X3Y

  • Ionic, X3Y

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91 mark

The nitrate(V) ion, NO3-, is a polyatomic ion, bonded by covalent bonds.

Which of the following shows the correct displayed formula for the nitrate ion?

q9-4-1_hard_mcq_ib-chemistry-sl

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101 mark

In which series of compounds does covalent character increase when going from left to right?

  • KI, KBr, KCl

  • NaI, KI, RbI

  • NaCl, MgCl2, AlCl3

  • SO2, P4O10, SiO2

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11 mark

Which of the following statements about 2-methylpropan-2-ol, CH3C(CH3)(OH)CH3, are correct ? 

  1. The structure contains 16 bonding pair of electrons
  2. The O-C-C bond angle is 109.5 o
  3. The total number of electrons is 32

  • I and II only 

  • I and III only 

  • II and III only 

  • I, II and III

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21 mark

Which of the following molecules has the biggest overall dipole?

q2_4-1_medium_mcq_ib-chemistry-hl

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31 mark

 The electronegativity of four elements are given below 

N = 3.0       H = 2.1       F = 4.0      P = 2.1      

 What is the correct order of polarity for the following compounds

  • PH3 < PF3 < NF3 < NH3

  • PH3 < PF3 < NH3 < NF3   

  • NF3 < NH3 < PH3 < PF3 

  • PH3 < NH3 < NF3 < PF3 

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41 mark

Which of the following compounds has both covalent and ionic bonds?

  • calcium bromide, CaBr2

  • potassium carbonate, K2CO3

  • propanoic acid, CH3CH2COOH

  • dichloromethane, CH2Cl2

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51 mark

Which is the best description of ionic bonding?

  • electrostatic attraction between cations and electrons

  • electrostatic attraction between nuclei

  • electrostatic attraction between oppositely charged ions

  • electrostatic attraction of nuclei towards shared electrons in the bond between the nuclei

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61 mark

Below are four molecules. Which is the most polar molecule present?

  • CH3NH2

  • CH4

  • CCl4

  • CO2

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71 mark

 Potassium bromide is an ionic compound. 

When can potassium bromide conduct electricity?

 

Solid

Molten

Aqueous

A

✓

✓

⨯

B

✓

⨯

✓

C

⨯

✓

✓

D

⨯

⨯

✓

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81 mark

A periodic table is needed to answer this question.

Of the four compounds listed below which one has the greatest ionic character?

  • HCl

  • MgS

  • CO2

  • CaO

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91 mark

What is the correct formula for aluminium sulfate?

  • Al3(SO4)2

  • Al(SO4)2

  • Al2(SO4)3

  • AlSO4

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101 mark

Aluminium iodide, Al2I6 is a dimer and exists as a solid at room temperature. When it is a vapour it can exist as an AlI3 molecule. 

How many valence electrons are in an aluminium iodide, AlI3, molecule?

  • 22

  • 24

  • 26

  • 28

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