The results are shown. (a) Which of the metals used is highest in the electrochemical series? 1 (b) Which two of the metals used would produce the highest voltage when connected in a 1 cell? (c) What would be the reading on the voltmeter if both strips of metal were copper? 1 Answers Sample Answers and Mark Allocation (a) (metal) 3 Not acceptable: 0·9 1 (Metal) C (b) (metal) 2 and (metal) 3 Not acceptable: 0·2 and 0·9 any other combination for follow through for incorrect answer in (a) (metal) 3 and students answer in (a) 1 (c) 0/ 0·0 / zero 1 Not acceptable: No voltage Marks Int 2 Strontium can be extracted from the compound strontium chloride electrolysis. 1 B Label the diagram to show the charge on each electrode. Q1(b)
The results are shown. (a) Which of the metals used is highest in the electrochemical series? 1 (b) Which two of the metals used would produce the highest voltage when connected in a cell? 1 (c) What would be the reading on the voltmeter if both strips of metal were copper? 1 Answers Sample Answers and Mark Allocation (a) (metal) 3 0·9 1 Not acceptable: (Metal) C (b) (metal) 2 and (metal) 3 0·2 and 0·9 for follow through for incorrect answer in (a) (metal) 3 and students answer in (a) 1 Not acceptable: any other combination (c) 0/ 0·0 / zero 1 Not acceptable: No voltage Marks Int 2 B Q1(b) Strontium can be extracted from the compound strontium chloride electrolysis. Label the diagram to show the charge on each electrode. 1
Chemistry-N5-Past-Paper-Questions-Chemistry-in-Society3.docx