Notes on the grade 12 September memoranda

Clarifications about the grade 12 September memoranda will be posted here as soon as feedback is received from the examiners and/or internal moderators. Please email your enquiries to the usual address.

Physics

Q3.2

The word “net” does not appear in the learner's answer. How does this affect the allocation of marks?

Award the marks, because it is in accordance with the definition for a closed system.

Q4.2

The formula for static friction does not appear on the data sheet. Should this question be ignored as a result of this and should the paper be marked out of 147?

If the learner was not advised on this during the writing of the exam paper he/she should get the benefit as suggested.

Q5.1
Correction on memo. The answer should be:
No   -   Gravitational force is not the only force acting on the block/Normal force is also acting on the block.

Q8.2.2

How must marks be awarded to the following solution?

Q9.2.3

The memo calculates period, but frequency is asked.

Typing error in memo. Formula should be f = 1/T.

Chemistry 

Q3.4
Final decision on this question, despite the conflicting info in the paper, is to mark it as discussed via IBP. The question cannot be scratched.

Q4.2.2
No indication is given in the diagram whether the alcohol is the major or minor product.
Decision: Accept the structural formula of the minor product, i.e. propan-1-ol.

Remember that -OH can be accepted instead of -O-H in the structural formula,

Q4.4.1
This question is related to Q4.2.2.
Decision: If the minor product was given in Q4.2.2, then this answer should be 1-chloropropane.

Q7.2.4
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