CaribQuiz - Chemistry
Chemistry
1. Question

To make cell walls, plants must have:

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2. Question

When dilute sulphuric acid is electrolysed the two gases produced are hydrogen and:

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3. Question

Alcohol can be separated from beer using:

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4. Question

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

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5. Question

All of these are fractions from crude oil EXCEPT for:

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6. Question

All of these elements form allotropes EXCEPT for:

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7. Question

All of these reactions are exothermic EXCEPT for:

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8. Question

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

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9. Question

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

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10. Question

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

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11. Question

Nitrogen fixation produces:

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12. Question

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

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13. Question

When gas particles spread out we call it:

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14. Question

Powders react faster than lumps because they have:

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15. Question

When limestone is heated strongly it changes into:

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16. Question

The common name for ascorbic acid is:

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17. Question

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

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18. Question

All of these are used as food additives EXCEPT for:

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19. Question

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

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20. Question

The only common gas that turns moist red litmus paper blue is:

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21. Question

The electrical charges on a proton and an electron are:

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22. Question

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

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23. Question

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

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24. Question

The state symbol for a solution in water is:

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25. Question

When metals react with acids they give a salt and:

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26. Question

The proportions of elements in a pure compound are always:

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27. Question

The two main protein groups are globular and:

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28. Question

All of the following are non-metals EXCEPT for:

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29. Question

Dividing the mass in grams by the mass of 1 mole in grams gives:

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30. Question

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

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31. Question

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

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32. Question

Acid soils can be neutralised by adding:

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33. Question

To make car bodies we use:

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34. Question

The non-metal used to make margarine is:

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35. Question

The number of litres in 2000 cm3 is:

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36. Question

Raising the temperature of a reversible reaction always encourages the:

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37. Question

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

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38. Question

All of these are properties of carbon monoxide EXCEPT for:

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39. Question

The standard atom used for mass calculations is:

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40. Question

The number of electrons shared in a single covalent bond is:

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