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Chemistry
1. Question

The voltages from the electrochemical series are -2.92 for potassium and +0.34 for copper, which shows that:

2. Question

A molecule of ethene can be described as all of these EXCEPT for:

3. Question

Ammonia gas spreads out faster than hydrogen chloride, showing that it is:

4. Question

All of these are trace elements EXCEPT for:

5. Question

The alloy, brass, contains copper and:

6. Question

Which one of the following gases is considerably heavier than air?

7. Question

The number of carbon atoms in the alcohol, pentanol, is:

8. Question

A salt that contains water of crystallisation is:

9. Question

When black copper oxide is heated with carbon, brown copper metal is produced, which means that compared to copper, carbon is the:

10. Question

All of these are properties of carbon monoxide EXCEPT for:

11. Question

In a water condenser the cooling water enters at:

12. Question

The only one of the following which is NOT a change of state is:

13. Question

The number of particles in a mole of any gas is always:

14. Question

For Mg++ to turn into an atom of magnesium metal it must:

15. Question

Powders react faster than lumps because they have:

16. Question

Different structures based on the same molecular formula are called:

17. Question

In electrolysis the anode is the:

18. Question

The alkane compound with seven carbon atoms is:

19. Question

The catalyst in the Haber Process is:

20. Question

Herbicides are used to destroy:

21. Question

A salt that is anhydrous contains no:

22. Question

One example of an emulsifying agent is:

23. Question

If the relative atomic mass (RAM) = 1 for hydrogen and 16 for oxygen, the formula mass for H2O2 is:

24. Question

All of these materials are used in a blast furnace EXCEPT for:

25. Question

Biological catalysts in yeast are called:

26. Question

1 mole of sodium carbonate weighs 106 g, so the number of moles in 318 g will be:

27. Question

Cooking food improves all of these EXCEPT for:

28. Question

When two solutions are mixed and give a solid product we call it:

29. Question

The state symbol for a solution in water is:

30. Question

All of these are fractions from crude oil EXCEPT for:

31. Question

The number of double bonds in a molecule of carbon dioxide is:

32. Question

When metals react with acids they give a salt and:

33. Question

Common salt can be used to make all of these EXCEPT for:

34. Question

None of these solutions in water conducts electricity EXCEPT for:

35. Question

The Periodic Table is arranged in order of:

36. Question

All of these are compounds EXCEPT for:

37. Question

The number of electrons in a full electron shell is:

38. Question

The halogen, bromine, at room temperature is a:

39. Question

In the modern Periodic Table the elements are arranged:

40. Question

When large molecules are broken down into smaller ones it is called:

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