CAPE Chemistry Unit 1 · 2017

22 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)3 marksHeat strongly a small quantity of R and allow to cool. Test for gas evolved. Observe residue.
2. 1(b)2 marksTo a small sample of R, add dilute HCl and warm.
3. 1(c)2 marksTo another small sample of R, add concentrated H₂SO₄ and heat carefully.
4. 1(d)(i)3 marksDissolve a spatula-full of R in minimum volume of dilute hydrochloric acid (warming if needed). Dilute with water to half of a test tube. Divide the solution into two portions and carry out the following tests. To the…
5. 1(d)(ii)1 markTo the second sample of the solution add AgNO₃(aq).
6. 1(e)1 markWrite the chemical formula for the other product formed with water when excess NaOH(aq) is added in (d) (i).
7. 2(a)5 marksPresent the data provided above, as well as the temperature T(K), in a tabular format.
8. 2(b)4 marksOn the grid provided below, plot a graph of volume of gas V(dm³) against temperature T(K), circling the plotted points.
9. 2(c)(i)1 markFrom your graph, deduce the volume occupied by the gas at a temperature of 373 K.
10. 2(c)(ii)1 markFrom your graph, deduce the relationship between the volume (V) of the gas and the temperature (T).
11. 2(d)1 markWrite an equation to represent the relationship in (c) (ii).
12. 2(e)1 markState the significance of the gradient in relation to the equation in (d).
13. 2(f)3 marksCalculate the value of the gradient of the graph, stating the relevant units.
14. 3(a)1 markHypothesis
15. 3(b)1 markAim
16. 3(d)3 marksExperimental method
17. 3(e)(i)3 marksVariables: Manipulated
18. 3(e)(ii)1 markVariables: Responding
19. 3(e)(iii)1 markVariables: Controlled
20. 3(f)1 markExpected results
21. 3(g)1 markTreatment of results
22. 3(h)1 markONE source of error in the experiment