Carib Quiz - Chemistry
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Chemistry
1. Question

To complete the reaction: acid + carbonate → salt + carbon dioxide + ?, we must add the word:

2. Question

When potassium burns in chlorine, the material that is oxidised is called:

3. Question

More collisions between particles are likely to happen if a solution is made:

4. Question

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

5. Question

The active catalyst in a car′s catalytic converter is:

6. Question

All of these elements form allotropes EXCEPT for:

7. Question

If a reaction takes 50 seconds at 25 ℃, then at 50 ℃ the time for the reaction in seconds is likely to be about:

8. Question

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

9. Question

The simplest ratio of atoms in a compound is given by the:

10. Question

Powders react faster than lumps because they have:

11. Question

The main metal in tin cans used to preserve food is:

12. Question

The alloy, brass, contains copper and:

13. Question

All of these are trace elements EXCEPT for:

14. Question

None of these solutions in water conducts electricity EXCEPT for:

15. Question

In terms of mass, compared to a proton, an electron:

16. Question

To work out the heat change in a reaction we need to know just three things, the mass, the temperature change and the:

17. Question

Biological catalysts in yeast are called:

18. Question

In the equation, carbon monoxide + oxygen → carbon dioxide, a reactant is:

19. Question

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

20. Question

The number of electrons in a full electron shell is:

21. Question

All of these are carbohydrates EXCEPT for:

22. Question

A ballpoint pen mark can be removed using:

23. Question

All of these are alkenes EXCEPT for:

24. Question

Oxidation can include all of these EXCEPT for:

25. Question

The Haber Process is used to make:

26. Question

At 20 ℃ all of the halogens are:

27. Question

The number of atoms in this formula, H2SO4, is:

28. Question

To make cell walls, plants must have:

29. Question

To make fertilisers and explosives we need:

30. Question

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

31. Question

The proportions of elements in a pure compound are always:

32. Question

Acid soils can be neutralised by adding:

33. Question

All of these are ordered crystalline structures EXCEPT for:

34. Question

An insoluble metal oxide can be described as:

35. Question

In the reactivity series of metals the order is: sodium, calcium, magnesium, aluminium, which means that the most reactive metal is:

36. Question

Herbicides are used to destroy:

37. Question

Food can be preserved in all of these ways EXCEPT for:

38. Question

All of these are used as food additives EXCEPT for:

39. Question

The second most common gas in the atmosphere is:

40. Question

The number of kilos in 1 metric tonne is:

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Chemistry Unit 1