Carib Quiz - Chemistry
1. Question

The Earth′s first atmosphere contained all of these gases EXCEPT for:

2. Question

The standard atom used for mass calculations is:

3. Question

When metals react with acids they give a salt and:

4. Question

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

5. Question

We can separate an insoluble solid from a liquid using:

6. Question

To remove limescale from a tap you need:

7. Question

The gas that relights a glowing splint is:

8. Question

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

9. Question

In a water condenser the cooling water enters at:

10. Question

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

11. Question

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

12. Question

All of the following are non-metals EXCEPT for:

13. Question

One example of an emulsifying agent is:

14. Question

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

15. Question

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

16. Question

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

17. 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:

18. Question

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

19. Question

Iron chloride can be prepared from the reaction of iron and:

20. Question

In electrolysis the anode is the:

21. Question

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

22. Question

When an element combines with oxygen we get an:

23. Question

The gas released by baking powder is:

24. Question

The halogen, bromine, at room temperature is a:

25. Question

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

26. Question

g/dm3 are units of:

27. Question

The electrical charges on a proton and an electron are:

28. Question

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

29. Question

A reaction that gives out heat is said to be:

30. Question

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

31. Question

The number of litres in 2000 cm3 is:

32. Question

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

33. Question

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

34. Question

Cooking food improves all of these EXCEPT for:

35. Question

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

36. Question

When an acid neutralises an alkali the pH is likely to be:

37. Question

The sharp-tasting compound in vinegar is:

38. Question

The pH scale runs from 1 to:

39. Question

All of these are properties of carbon monoxide EXCEPT for:

40. Question

In the modern Periodic Table the elements are arranged:

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Chemistry Unit 1