Chemistry (All)
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Chemistry (All)
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25 Questions

1. Which group do elements start being non metals

2. Explain what is meant by electric current

3. Write the chemical equation for the reaction that produced heat in the blast furnace

4. What is meant by the term activation energy?

5. Concentrations effect on the rate of reaction

6. Balance the equation for the reaction: ___ hcl(aq) + ___ mno₂(s) -> ___mncl₂(aq) + ___h₂o(l) + ___ cl₂(g)

7. What happens when you go across the period by one

8. Base

9. Acid + metal

10. What is meant by the term biodegradable?

11. Explain the term reduction

12. How many bonds does each carbon atom form in a hydrocarbon

13. Suggest how the reactivity of astatine compares to that of iodine. Explain your answer.

14. Phosphorous containing fertilisers

15. State the uses of sodium hydroxide.

16. Models of the atom

17. State the observation in the reaction between hcl(g) and nh₃(g)

18. State the method used to extract the red dye from a sample of rose petals

19. State the catalyst used for the manufacture of ammonia by the haber process

20. A sample of carbon contained 98.90% carbon-12 and 1.10% carbon-13. Calculate the relative atomic mass of carbon

21. Neutral ph

22. Explain why cracking is an important process in the oil industry

23. Describe the structure of an ionic compound - e.g nacl.

24. Sulfur dioxide

25. Acid + alkali

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