1.15 A piece of rock has a mass of 2.00 g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0 cm3 of 0.500 mol.dm–3 hydrochloric acid. What is the percentage of calcium carbonate in the 2.00 g piece of rock?   (1)

1.12  Elements D and E are both in Period 3. Element D has the smallest atomic radius in Period 3. There are only two elements in Period 3 which have a lower melting point than element E. Elements D and E react together to form compound L.   (1) Which compound could be L  A  MgCl2 B MgS C Na2S D PCl 3  

1.19 When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are formed.   NH4Cl (s)< == > NH3(g) + HCl (g)   The initial amount of ammonium chloride was 1.00 mol, and when the system had reached equilibrium there was 0.300 mol of ammonium chloride.   What is the numerical value of Kc for this reaction under these conditions? (1)    

1.3 The relative atomic mass of copper is 63.5. Which chart is the correct mass spectrum that would lead to this value? (1)   Right-click on the button to open the data booklet in a new tab.    

1.28 Compound X, C4H8O2, has an unbranched carbon chain. An aqueous solution of X has an approximate pH of 3.   Compound Y, C3H8O, is a secondary alcohol. X and Y are reacted together in the presence of a little concentrated sulfuric acid to form Z as the major organic product.   What is the structural formula of Z?   A (CH3)2CHCO2CH2CH2CH3 B CH3(CH2)2CO2CH(CH3)2 C CH3(CH2)2CO2(CH2)2CH3 D (CH3)2CHCO2CH(CH3)2 (1)  

 1.14 The solids sodium chloride and sodium iodide both react with concentrated sulfuric acid at room temperature.   With NaCl, the products are NaHSO4 and HCl. With NaI, the products are NaHSO4, HI, I2, SO2, H2O, S and H2S.   What is the best explanation for this difference in products?   (1)

 1.13   X and Y are both Group 2 metals. X and Y both form hydroxide compounds, but X(OH)2 is more soluble in water than Y(OH)2. If a piece of metal Y is put into cold water a very slow reaction occurs, and only few small hydrogen bubbles can be seen. What could the identities of X and Y be?   (1)

 1.7 Methanol may be prepared by the reaction between carbon monoxide and hydrogen. CO(g) + 2H2(g) → CH3OH(g) The relevant average bond energies are given below. E (C ≡ O) 1077 kJ/ mol E (C – O) 360 kJ/ mol E (C – H) 410 kJ/ mol E (H – H) 436 kJ/ mol E (O – H) 460 kJ/ mol   What is the enthalpy change of this reaction? (1)

QUESTION 2:  2. Study Figure 2 below. Discuss the composition of the figure/s in this sculpture and consider how the sculptor has created a sense of dynamism.       (12)     MARKING RUBRIC FOR VISUAL ANALYSIS LEVEL MARK DESCRIPTOR   0 No rewardable material LEVEL 1 1-3 Analysis and interpretation are limited, showing basic understanding of visual language [AO2] Basic critical judgement, with limited reasoned argument and evidence [AO3] LEVEL 2 4-6 Analysis and interpretation are generally competent, showing an adequate understanding of visual language. [AO2] Adequate critical judgement, supported by generally competent reasoned argument and evidence [AO3] LEVEL 3 7-9 Analysis and interpretation are coherent throughout, showing a secure understanding of visual language. [AO2] Good critical judgement, supported by coherent reasoned argument and evidence throughout [AO3] LEVEL 4 10-12 Analysis and interpretation are perceptive throughout, showing excellent understanding of visual language [AO2] In-depth critical judgement, supported by excellent reasoned argument and evidence throughout [AO3]

19. Choose the correct answer: (5)   Think about the qualities that good leaders possess. Which of the following characteristics, would you say, did Nelson Mandela portray? Choose five.     Forgiveness Shy Bravery Seeks peace Neatness Being fair Determination