CaribQuiz - Chemistry
Chemistry
1. Question

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

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2. Question

If a flask containing marble and acid is placed on a balance, the mass decreases steadily with time, which means that:

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3. Question

When zinc metal is added to copper sulphate solution the products are copper and zinc sulphate solution, so the material that has been displaced must be:

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4. Question

The following are all natural materials EXCEPT for:

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5. Question

Candied fruits are preserved in a strong solution of:

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6. Question

A reaction that gives out heat is said to be:

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7. Question

The monomer used to make poly (propene) is called:

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8. Question

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

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9. Question

All of these are used as food additives EXCEPT for:

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10. Question

The common name for ascorbic acid is:

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11. Question

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

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12. Question

To make fertilisers and explosives we need:

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13. Question

Alcohol can be separated from beer using:

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14. Question

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

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15. Question

In an atom the neutron is found:

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16. Question

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

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17. Question

When zinc sulphide is heated in air the gas produced is:

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18. Question

All of these are alkenes EXCEPT for:

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19. Question

You never find native magnesium because:

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20. Question

The second most common gas in the atmosphere is:

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21. Question

The common name for silicon dioxide is:

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22. Question

The proportions of elements in a pure compound are always:

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23. Question

The halogen used to make bleach is called:

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24. Question

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

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25. Question

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

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26. Question

All of these are ordered crystalline structures EXCEPT for:

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27. Question

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

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28. Question

Biological catalysts in yeast are called:

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29. Question

The electrical charges on a proton and an electron are:

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30. Question

The alkane compound with seven carbon atoms is:

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31. Question

We use expanded polystyrene cups for heat of reaction experiments because the cups are:

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32. Question

In a titration the long tube with a volume scale is a:

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33. Question

Adding mineral water to anhydrous copper sulphate turns it:

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34. Question

The units we use for heat given out by a reaction are:

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35. Question

Potassium reacts quickly with water but we do not use it with acids because:

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36. Question

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

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37. Question

To make cell walls, plants must have:

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38. Question

The alcohol in beer and spirits is called:

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39. Question

The sharp-tasting compound in vinegar is:

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40. Question

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

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40 Question
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