CfE Higher Unit 1 Periodicity, Bonding and Structure Section 1 Past Paper Homework
- Which of the following elements has the greatest attraction for bonding electrons?
ALithium
BChlorine
CSodium
DBromine
- Which of the following structure is never found in compounds?
AIonic
BMonatomic
CCovalent network
DCovalent molecular
- Which of the following chlorides is likely to have the most ionic character?
ALiCl
BCsCl
CBeCl2
DCaCl2
- Which of the following elements exists as discrete molecules?
ABoron
BCarbon (diamond)
CSilicon
DSulphur
- Which type of bonding is never found in elements?
AMetallic
BLondon dispersion forces
CPolar covalent
DNon-polar covalent
- A positively charged particle with electron arrangement 2,8 could be
Aa neon atom
Ba fluoride ion
Ca sodium atom
Dan aluminium ion
- Which of the following chlorides is most likely to be soluble in tetrachloromethane, CCl4?
ABarium chloride
BCaesium chloride
CCalcium chloride
DPhosphorus chloride
- In which of the following liquids does hydrogen bonding occur?
AEthanoic acid
BCyclohexane
CHexane
DHex-1-ene
- Which of the following chloride is likely to have the least ionic character?
ABeCl2
BCaCl2
CLiCl2
DCsCl
- A compound boils at -33oC. It also dissolves in water to give an alkaline solution. Which type of bonding is present within the compound?
AMetallic
BCovalent (polar)
CIonic
DCovalent (non-polar)
- Which of the following compounds has polar molecules?
ACH4
BCO2
CNH3
DCCl4
- Which of the following elements has the smallest electronegativity?
ALithium
BCaesium
CFluorine
DIodine
- A substance melts at 1074oC and boils at 1740oC. The passage of an electric current through the molten substance results in electrolysis. What type of structure is present in the substance?
AIonic
BMetallic
CCovalent molecular
DCovalent network
- Which of the following has a covalent molecular structure?
ARadium chloride
BA noble gas
CSilicon dioxide
D A fullerene
- A metal (melting point 328oC, density 11.3g cm-3) was obtained by electrolysis of its molten chloride (melting point 501oC, density 5.84g cm-3). During the electrolysis, how would the metal occur?
AAs a solid on the surface of the electrolyte
BAs a liquid on the surface of the electrolyte
CAs a solid on the bottom of the electrolyte
DAs a liquid on the bottom of the electrolyte
- Carbon dioxide is a gas at room temperature while silicon dioxide is a solid because
ALondon dispersion forces are much weaker than covalent bonds
Bcarbon dioxide contains double covalent bonds and silicon dioxide contains single covalent bonds
Ccarbon - oxygen bonds are less polar than silicon – oxygen bonds
Dthe relative formula mass of carbon dioxide is less than that of silicon dioxide
- An element (melting point above 3000oC) forms an oxide which is a gas at room temperature. Which type of bonding is likely to be present in the element?
AMetallic
BPolar covalent
CNon-polar covalent
DIonic
- Which of the following compounds has polar molecules?
ACO2
BNH3
CCCl4
DCH4
- Which of the following atoms has the least attraction for bonding electrons?
ACarbon
BNitrogen
CPhosphorus
DSilicon
- Which line in the table represents the solid in which only London dispersion forces are overcome when the substance melts?
Melting point/oC / Electrical conduction of solid
A / 714 / non-conductor
B / 98 / conductor
C / 660 / conductor
D / 44 / non-conductor
- The diagram shows the melting points of successive elements across a period in the Periodic Table.
Which of the following is a correct reason for the low melting point of the element Y?
AIt has weak ionic bonds
BIt has weak covalent bonds
CIt has weakly-held outer electrons
DIt has weak forces between molecules