Multiple choice questions
There are two papers for each tier of entry, Foundation and Higher. Each paper is split into two sections, Section A and Section B.
| Section | Type(s) of questions | Marks per question |
| A | Multiple choice | 1 |
| B | Short answer, extended response | 1 to 5, 6 |
| Section | A |
|---|---|
| Type(s) of questions | Multiple choice |
| Marks per question | 1 |
| Section | B |
|---|---|
| Type(s) of questions | Short answer, extended response |
| Marks per question | 1 to 5, 6 |
The short answer questions contain different styles, including:
- structured questions
- maths questions
- practical questions
Multiple choice questions appear in both exam papers, and at both tiers. Multiple choice questions are asked as questions, often starting with â€What is...?’ or â€Which of these...?’.
You have four options to choose from in a multiple choice question. You must only choose one of these options, by writing your answer (A, B, C, or D) in a box.
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Sample question 1 - Foundation
Question
Ammonium phosphate is used as a fertiliser. The formula for ammonium phosphate is:
(NH4)3PO4
Which elements in ammonium phosphate are essential elements for plant growth? [1 mark]
A nitrogen and hydrogen
B nitrogen and phosphorus
C hydrogen and oxygen
D phosphorus and oxygen
OCR Gateway Science, GCE Chemistry, Paper J248, 2016.
B [1]
Sample question 2 - Higher
Question
Urea is a fertiliser. The formula for urea is:
(NH2)2CO
A student makes one mole of urea from two moles of ammonia.
What is the mass of urea that the student makes? [1 mark]
A 43.0 g
B 44.0 g
C 58.0 g
D 60.0 g
OCR Gateway Science, GCE Chemistry, Paper J248, 2016 - Higher.
D [1]
Sample question 3 - Higher
Question
A student is making a fertiliser called potassium nitrate, KNO3.
Look at the equation for the reaction she uses.
KOH + HNO3 → KNO3 + H2O
The relative formula masses, Mr, of each compound are shown in the table.
| Compound | Formula | Relative formula mass |
| potassium hydroxide | KOH | 56.1 |
| nitric acid | HNO3 | 63.0 |
| potassium nitrate | KNO3 | 101.1 |
| water | H2O | 18.0 |
| Compound | potassium hydroxide |
|---|---|
| Formula | KOH |
| Relative formula mass | 56.1 |
| Compound | nitric acid |
|---|---|
| Formula | HNO3 |
| Relative formula mass | 63.0 |
| Compound | potassium nitrate |
|---|---|
| Formula | KNO3 |
| Relative formula mass | 101.1 |
| Compound | water |
|---|---|
| Formula | H2O |
| Relative formula mass | 18.0 |
What is the atom economy for the reaction to make potassium nitrate? [1 mark]
Assume that water is a waste product.
A 15.1%
B 47.1%
C 52.9%
D 84.9%
OCR Gateway Science, GCE Chemistry, Paper J248, 2016 - Higher.
D [1]