Topic 4: Chemical Bonding and Structure - Mock Prep 2023
Quiz by arnel
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- Q1
1) What is the formula for the compound formed by calcium and nitrogen?
Ca3N2
CaN
Ca2N3
Ca2N
60sEditDelete - Q2
2) Element X is in group 2, and element Y in group 7, of the periodic table. Which ions will be present in the compound formed when X and Y react together?
X2+ and Y–
X+ and Y2-
X+ and Y–
X2- and Y+
60sEditDelete - Q3
3) Based on electronegativity values, which bond is the most polar?
C―O
N―O
O―F
B―C
60sEditDelete - Q4
4) What is the Lewis (electron dot) structure for sulfur dioxide?
60sEditDelete - Q5
5) Which substance is most soluble in water (in mol dm–3) at 298 K?
CH3CH3
CH3CH2OH
CH3OCH3
CH3CH2CH2CH2OH
60sEditDelete - Q6
6) According to VSEPR theory, repulsion between electron pairs in a valence shell decreases in the order
lone pair-lone pair > bond pair-bond pair > bond pair-lone pair
bond pair-bond pair > lone pair-lone pair > lone pair-bond pair
lone pair-lone pair > lone pair-bond pair > bond pair-bond pair
bond pair-bond pair > lone pair-bond pair > lone pair-lone pair
60sEditDelete - Q7
7) Which molecule is linear?
H2S
CO2
Cl2O
SO2
60sEditDelete - Q8
8) Why is the boiling point of PH3 lower than that of NH3?
Vander Waals’ forces are weaker in PH3 than in NH3
PH3 is not hydrogen bonded whereas NH3 is hydrogen bonded
PH3 is non-polar whereas NH3 is polar
The molar mass of PH3 is greater than that of NH3
60sEditDelete - Q9
9) Which molecule is non-polar?
H2CO
CHCl3
NF3
SO3
60sEditDelete - Q10
10) What happens when sodium and oxygen combine together?
Each sodium atom loses one electron.
Each oxygen atom loses one electron
Each sodium atom gains one electron
Each oxygen atom gains one electron
60sEditDelete - Q11
11) Which statement is correct about two elements whose atoms form a covalent bond with each other?
The elements have very different electronegativity values.
The elements are metals.
The elements have very low electronegativity values.
The elements are non-metals.
60sEditDelete - Q12
12) Which substance has the lowest electrical conductivity?
H2 (g)
Cu (s)
LiOH (aq)
Hg (l)
60sEditDelete - Q13
13) When the following bond types are listed in decreasing order of strength (strongest first), what is the correct order?
covalent > van der Waals’ > hydrogen
covalent > hydrogen > van der Waals’
hydrogen > covalent > van der Waals’
vander Waals’ > hydrogen > covalent
60sEditDelete - Q14
14) Which statement is true for most ionic compounds?
They conduct electricity in the solid state
They contain elements of similar electronegativity
They are coloured
They have high melting and boiling points.
60sEditDelete - Q15
15) What is the valence shell electron pair repulsion (VSEPR) theory used to predict?
The type of bonding in compounds
The energy levels in an atom
The electronegativities of elements
The shapes of molecules and ions
60sEditDelete - Q16
16) Which fluoride is the most ionic?
MgF2
CsF
NaF
BaF2
60sEditDelete - Q17
17) Which substance is most similar in shape to NH3?
BF3
FeCl3
GaI3
PBr3
60sEditDelete - Q18
18) Which statement is a correct description of electron loss in this reaction?
2Al + 3S --> Al2S3
Each sulfur atom loses two electrons
Each sulfur atom loses three electrons
Each aluminium atom loses three electrons.
Each aluminium atom loses two electrons
60sEditDelete - Q19
19) Which molecule has the smallest bond angle?
CO2
C2H4
NH3
CH4
60sEditDelete - Q20
20) In which substance is hydrogen bonding present?
CH3CHO
CH4
CH2F2
CH3OH
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