Sample Assessment Schedule 2012

NCEA Level 2 Chemistry 91165 (2.5) — page 4 of 6
CH 3 CH 2 NH 2 + H 2 O CH 3 CH 2 NH 3
+
+
OH –
Equation with bromine water –
CH 3 – CH 2 – CH 2 – CH 2 – CH=CH 2 +
Br 2 CH 3 – CH 2 – CH 2 – CH 2 – CHBr–
CH 2 Br
NØ
N1
N2
A3
A4
M5
M6
E7
E8
No response or does not address the question.
Provides some writing but does not fulfil any statement from the Achievement criteria column.
Any ONE statement from the Achievement criteria column.
Any TWO statements from the Achievement criteria column.
Any THREE statements from the Achievement criteria column.
TWO solutions identified with all tests to positively identify.
Gives BOTH statements from the Merit criteria column.
Only minor error – omission or additional information – from the Excellence criteria column.
All the evidence from the Excellence criteria column.
Three Expected Coverage Achievement Merit Excellence
(a)
(b) (i)
Compound A is CH 3 –CH 2 –CH 2 –OH
Compound B is CH 3 –CH 2 –CH 2 –NH 2
THREE of the
following:
in (a) compound
(ii) Reactant P is HCI
A correct
Reactant Q is concentrated H 2 SO 4
in (b) TWO out
Reactant R is HCl
of FOUR
(c) (i)
(ii)
(1) substitution.
(2) substitution.
(3) elimination.
(4) addition.
compounds of
reactants
correct
in (c)(i) TWO
reaction types
described but
not linked to the
atoms involved
Molecules that undergo substitution
reactions have carbon to carbon single
bonds and form molecules with carbon
to carbon single bonds. In a substitution
reaction an atom or group of atoms is
replaced by another atom or group of
atoms.
Molecules that undergo elimination
reactions have carbon to carbon single
bonds and form molecules with carbon
to carbon double bonds. In an
elimination reaction two atoms or small
groups are removed from a molecule
forming a carbon to carbon to double
bond.
Molecules that undergo addition
in (c) (ii) ONE
reaction type
described.
In (c) THREE
reactions correct
in terms of
reactant, product
and reaction type
which is linked to
a reason for the
reaction type.
In (c) THREE
reactions correct
in terms of both
reactant, product
and reaction type
AND the
justification of
reaction type for
that reaction.