C3 Revision OCR science

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  1. How would you separate sodium chloride in water?

    A) filtration
    B) simple distillation
    C) crystallization
    D) fractional distillation
    C) crystallization
    (this multiple choice question has been scrambled)
  2. what does (s) (g) (l) and (aq) in a chemical word equation?

    A) filtration
    B) solid,gas,liquid and aqueous solution
    C) crystallization
    D) simple distillation
    B) solid,gas,liquid and aqueous solution
    (this multiple choice question has been scrambled)
  3. what does oilrig stand for?
    oxidation is loss off electrons,reduction is gain of electrons
  4. What types of ions do non metal make?
    negative ions
  5. what is the balanced equation for H2+O2 --> H2O   
    2H2+O2 -->2H2O
  6. If something losses electrons it is oxidised or reduced?
    oxidised
  7. when making bonds does is require energy or realises energy?
    realises energy.
  8. when doing exothermic and endothermic how would you know if the reaction is endo or exo
    if its endothermic the answer will be positive but if its exothermic the answer will be negative
  9. in a chemical equations what are both sides called
    reactants and products
  10. what is a redox reaction
    a redox reaction is the gain of oxygen on the opposite side

Card Set Information

Author:
OliviaDC
ID:
331356
Filename:
C3 Revision OCR science
Updated:
2017-05-11 13:54:49
Tags:
science revision
Folders:
chemistry
Description:
revision
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