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  1. S

    Chemistry MCQ thread...

    how do you get 5? please explain.
  2. S

    Chemistry MCQ thread...

    please explain June 03 question 2.
  3. S

    Chemistry MCQ thread...

    please help me with june 06 question 38.
  4. S

    Chemistry MCQ thread...

    thanks alot :)
  5. S

    Chemistry MCQ thread...

    yeah. how?
  6. S

    Chemistry MCQ thread...

    this seems to be an easy question but im not getting the answer. Use of the Data Booklet is relevant to this question. When a sports medal with a total surface area of 150 cm2 was evenly coated with silver, using electrolysis, its mass increased by 0.216 g. How many atoms of silver were...
  7. S

    Chemistry MCQ thread...

    Please explain this: In an experiment, 50.0 cm3 of a 0.10 mol dm–3 solution of a metallic salt reacted exactly with 25.0 cm3 of 0.10 mol dm–3 aqueous sodium sulphite. The half-equation for oxidation of sulphite ion is shown below. SO3^ − 2 (aq) + H2O(I) → SO4^−2(aq) + 2H+(aq) + 2e– If the...
  8. S

    Chemistry MCQ thread...

    Use of the Data Booklet is relevant to this question. The combustion of fossil fuels is a major source of increasing atmospheric carbon dioxide, with a consequential rise in global warming. Another significant contribution to carbon dioxide levels comes from the thermal decomposition of...
  9. S

    Chemistry MCQ thread...

    N09 paper 11 Q 28?
  10. S

    Chemistry MCQ thread...

    please explain this: 0.200 mol of a hydrocarbon undergo complete combustion to give 35.2 g of carbon dioxide and 14.4 g of water as the only products. What is the molecular formula of the hydrocarbon? A C2H4 B C2H6 C C4H4 D C4H8 the answer is D.
  11. S

    Chemistry MCQ thread...

    Can some one please explain May/jun 09 Q4?
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