CaribQuiz - Chemistry
Chemistry
1. Question

The empirical formula, C6H12O6, gives the simplest ratio as:

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2. Question

The rate of reaction between marble and hydrochloric acid can be speeded up by using:

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3. Question

A salt that contains water of crystallisation is:

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4. Question

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

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5. Question

In metals, the particles forming the structure are all:

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6. Question

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

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7. Question

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

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8. Question

The number of kilos in 1 metric tonne is:

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9. Question

An insoluble metal oxide can be described as:

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10. Question

All of these are ordered crystalline structures EXCEPT for:

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11. Question

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

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12. Question

The number of litres in 2000 cm3 is:

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13. 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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14. Question

Alcohol can be separated from beer using:

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15. Question

All of these elements form allotropes EXCEPT for:

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16. Question

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

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17. Question

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

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18. Question

The common name for silicon dioxide is:

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19. Question

Quantity of electricity in coulombs = current in amps multiplied by:

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20. Question

We can separate an insoluble solid from a liquid using:

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21. Question

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

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22. Question

Reactive metals such as potassium react with water to give hydrogen and:

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23. Question

The halogen used to make bleach is called:

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24. Question

In electrolysis the anode is the:

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25. Question

Any solution with a pH below 7 must be:

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26. Question

To make cell walls, plants must have:

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27. Question

Raising the temperature of a reversible reaction always encourages the:

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28. Question

The proportions of elements in a pure compound are always:

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29. Question

In a water condenser the cooling water enters at:

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30. Question

A ballpoint pen mark can be removed using:

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31. Question

Transition metals have all of these properties EXCEPT for:

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32. Question

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

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33. Question

A liquid compound that conducts electricity is:

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34. Question

All of these are used as food additives EXCEPT for:

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35. Question

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

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36. Question

The halogen, bromine, at room temperature is a:

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37. Question

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

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38. Question

In making bread the enzymes in yeast break down starch to give:

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39. Question

Different structures based on the same molecular formula are called:

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40. Question

In an endothermic reaction:

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