Carib Quiz - Chemistry
1. Question

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

2. Question

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

3. Question

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

4. Question

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

5. Question

To remove limescale from a tap you need:

6. Question

In metals, the particles forming the structure are all:

7. Question

Candied fruits are preserved in a strong solution of:

8. Question

To electrolyse solid lead bromide it must first be heated so that:

9. Question

You never find native magnesium because:

10. Question

Hydrochloric acid forms salts called:

11. Question

The energy used in thermal decomposition is:

12. Question

When solid carbon dioxide turns straight into a gas we call it:

13. Question

All of these are used as food additives EXCEPT for:

14. Question

All of these are ordered crystalline structures EXCEPT for:

15. Question

Adding mineral water to anhydrous copper sulphate turns it:

16. Question

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

17. Question

Any solution with a pH below 7 must be:

18. Question

When black copper oxide is heated with carbon, brown copper metal is produced, which means that compared to copper, carbon is the:

19. Question

The second most common gas in the atmosphere is:

20. 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:

21. Question

To make fertilisers and explosives we need:

22. Question

The gas released by baking powder is:

23. Question

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

24. Question

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

25. Question

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

26. Question

When metals react with acids they give a salt and:

27. Question

To make car bodies we use:

28. Question

With iodine, starch changes colour to:

29. Question

A ballpoint pen mark can be removed using:

30. Question

All of these reactions are exothermic EXCEPT for:

31. Question

When limestone is heated strongly it changes into:

32. Question

The number of atoms in a diatomic molecule is:

33. Question

All of these are carbohydrates EXCEPT for:

34. Question

The two main protein groups are globular and:

35. Question

The number of carbon atoms in the alcohol, pentanol, is:

36. Question

All of these elements form allotropes EXCEPT for:

37. Question

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

38. Question

The Periodic Table is arranged in order of:

39. Question

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

40. Question

1 mole of gas occupies 24 litres at room temperature and pressure, so the number of moles in
72 litres is:

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Chemistry Unit 1