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Facultad De Medicina Mexicali
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June_2017_QP Paper_1_OCR A Chemistry_AS_Level
- Exam (elaborations) • 24 pages • 2021
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1 Which ion has a different number of electrons from the other three ions? 
 A Ga3+ 
 B Cl − 
 C S2− 
 D Ca2+ 
Your answer [1] 
2 An organic compound has the composition by mass: 
 C, 53.33 %; H, 11.11%; O, 35.56%. 
What is the empirical formula of the organic compound? 
 A C4H8O2 
 B C4H10O2 
 C C2H4O 
 D C2H5O 
Your answer [1] 
3 Samples of four hydrocarbons are completely burnt under the same conditions of temperature 
and pressure. 
Which sample produces the greatest volume of CO2? 
 ...
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