WorksheetsY12 Jan Mock Feedback
Total questions: 18
Worksheet time: 10mins
Q1
TICK ALL THAT APPLY
Which substances have a giant covalent lattices in their solid state?
SiO2
Si
Li
B
SO2
Q13.
TICK ALL THAT APPLY
Which of these substances show hydrogen bonding?
NF3
NH3
CH3COCH3
CH2F2
NiH2
Q15.
TICK ALL THAT APPLY
Which of these substances have permanent dipole-dipole forces
between molecules?
NF3
NH3
SiCl4
CH2F2
NiH2
Q16
TICK ALL THAT APPLY
Which molecules contain 12 bonding electrons?
NF3
NH3
SF6
CH2F2
C2H4
There are two types of covalent bonds in A Level chemistry.
What one type of bond can be seen in this drawing?
(a)
FILL IN THE BLANK:
This drawing contains _ orbitals
(a)
FILL IN THE BLANK:
This drawing contains a _ orbital
(a)
FILL IN THE BLANK:
pi-orbitals are formed by the (a) overlap of p-orbitals
TICK ALL CORRECT STATEMENTS
the bond angles around each carbon in the C=C of an alkene are 120°
a π-bond results from the overlap of adjacent p-orbitals directly between the bonding atoms
C=C double bonds are fixed and cannot rotate
stereoisomers exist in alkenes when there is restricted rotation around the C=C bond and 2 different groups on each C in that bond.
Which of the following statements about alkenes is correct?
TICK ALL THAT APPLY
a σ-bond is a sideways overlap of adjacent p-orbitals above and below the bonding C atoms
alkenes are reactive because of π-bonds are weaker than σ-bonds
a π-bond has restricted rotation around the axis of the bond.
the carbons in the C=C bond are trigonal pyramidal
For an alkene to have a stereoisomer
each C in the C=C bond must have
___ _________ ______
attached
(a)
When more than one product is possible in the reaction of an alkene with H–Br, the reaction will produce one as the major product.
What is the best explanation for the major product?
The H will add to the C in the C=C bond with the most hydrogen atoms attached.
in the mechanism, the most stable carbocation reacts to give the major product.
the major product comes from the most stable carbocation intermediate.
the major product is the most stable
Rank carbocation intermediates in the order of decreasing stability?
tertiary
secondary
primary
What does this general notation best represent?
a repeat unit of a polymer
a section of a polymer
a monomer
the structure of a polymer
TICK ALL THAT APPLY: a sustainability benefit of processing waste polymers is...
their use as fuel
their use to capture pests such as sea turtles
their use as organic feedstock
their combustion for energy production
Which molecules have the strongest intermolecular forces?
BF3
H2S
NH3
H2
NH3 has a lower boiling point than H2O.
Pick the TWO reasons why.
permanent dipole-dipole forces are weaker than hydrogen bonds
NH3's london forces are weaker than H2O's london forces
N and H have a smaller electronegativity difference than O and H, so NH3's hydrogen bonds are weaker than H2O's
N has only one lone pair for hydrogen bonding, while H2O has two
N and H have a smaller electronegativity difference than O and H, so NH3's covalent bonds are weaker than H2O's
TICK ALL THAT APPLY
What are the limitations of synthesis of haloalkanes using
free radical substitution?
Substitution can take place on a different carbon atom
The reaction rate is too slow
Free radicals are very reactive, which makes them dangerous
More than one H atom could be substituted on the same molecule
Produces different termination products
