CaribQuiz - Chemistry
Chemistry
1. Question

The type of bonding that involves loss or gain of electrons is called:

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2. Question

When an element combines with oxygen we get an:

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3. Question

The metal used in food containers whose surface is protected by a strong oxide layer is:

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4. Question

Biological catalysts in yeast are called:

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5. Question

One example of an emulsifying agent is:

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6. Question

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

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7. Question

The number of litres in 2000 cm3 is:

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8. Question

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

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9. Question

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

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10. Question

In an atom the neutron is found:

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11. Question

To make fertilisers and explosives we need:

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12. Question

At 20 ℃ all of the halogens are:

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13. Question

The gas released by baking powder is:

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14. Question

The Haber Process is used to make:

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15. Question

With iodine, starch changes colour to:

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16. Question

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

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17. Question

The charge on a sodium ion is always:

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18. Question

Hydrocarbons contain carbon and:

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19. Question

The number of atoms in a diatomic molecule is:

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20. Question

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

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21. Question

Different structures based on the same molecular formula are called:

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22. Question

A flame test colour of red could indicate the presence of a compound of:

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23. Question

All of the following have a charge of -1 EXCEPT for:

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24. Question

When aluminium is extracted by electrolysis, cryolite is added to:

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25. Question

A plastic that softens every time it is heated is said to be:

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26. Question

The major plant nutrients written as NPK refer to phosphorus, nitrogen and:

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27. Question

In an endothermic reaction:

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28. Question

All of these are compounds EXCEPT for:

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29. Question

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

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30. Question

To make cell walls, plants must have:

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31. Question

The state symbol for a solution in water is:

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32. Question

You never find native magnesium because:

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33. Question

The number of electrons in a full electron shell is:

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34. Question

Herbicides are used to destroy:

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35. Question

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

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36. Question

The alcohol in beer and spirits is called:

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37. Question

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

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38. Question

The halogen used to make bleach is called:

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39. Question

A ballpoint pen mark can be removed using:

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40. Question

Alcohol can be separated from beer using:

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