Chemistry Past Exam Paper (Cambridge Igcse)

2388 WordsDec 8, 201110 Pages
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *4308315385* CHEMISTRY Paper 2 Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name in the spaces at the top of this page. Write in dark blue or black pen. You may need to use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. A copy of the Periodic Table is printed on page 20. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end…show more content…
[1] (iv) Complete the symbol equation for the reaction of calcium oxide with hydrochloric acid. CaO + ...............HCl → CaCl 2 + ............... (v) State the chemical name of the compound CaCl 2. .............................................................................................................................. [1] [Total: 10] [2] For Examiner’s Use © UCLES 2010 0620/21/O/N/10 5 3 Helium and argon are noble gases. (a) State one use of helium. ..................................................................................................................................... [1] (b) The atomic structures of helium and argon are shown below. For Examiner’s Use X helium argon (i) State the name of the central part of the atom, labelled X. .............................................................................................................................. [1] (ii) Which statement about helium and argon is correct? Tick one box. Argon has an incomplete inner shell of electrons. An atom of argon has 16 electrons. Helium has a complete outer shell of electrons. Helium has an incomplete outer shell of electrons. [1] (iii) How many protons are there in an atom of argon? .............................................................................................................................. [1] (iv) The symbol for a particular isotope of helium is written as 4 He . 2 Write a similar symbol for the isotope of argon

More about Chemistry Past Exam Paper (Cambridge Igcse)

Open Document