Topic 10 Qualitative and materials

Question 1

1 To which group in the periodic table do lithium, sodium and potassium belong?

Answer 1

group 1

Question 2

2 To get a hot blue Bunsen burner flame, do you open or close the air hole?

Answer 2

open it

Question 3

3 What is the formula for a calcium ion?

Answer 3

Ca²⁺

Question 4

4 Which of these is a transition metal: copper or calcium?

Answer 4

copper

Question 5

5 Name the metal ions present in KCl, K₂SO₄ and KNO₃.

Answer 5

potassium/K⁺

Question 6

6 What name is given to the rainbow of colours seen when white light passes through a prism?

Answer 6

spectrum

Question 7

7 What is the concentration of the solution formed by dissolving 1 g of salt in 2 dm³ of water?

Answer 7

0.5 g dm^–3

Question 8

8 What colour flame do you see when potassium reacts with water?

Answer 8

lilac

Question 9

9 Is calcium chloride a covalent compound or an ionic compound?

Answer 9

ionic

Question 10

10 Which of these compounds is soluble in water: sodium carbonate or calcium carbonate?

Answer 10

sodium carbonate

Question 11

11 Give the flame test colour for sodium ions, Na+.

Answer 11

yellow

Question 12

12 Which metal ion produces a blue-green flame test colour?

Answer 12

copper

Question 13

13 Which metal ion produces an orange-red flame test colour?

Answer 13

calcium

Question 14

14 Give the flame test colour for potassium ions, K+.

Answer 14

lilac

Question 15

15 Give one way that instrumental methods improve the analysis of substances.

Answer 15

more sensitive/more accurate/faster

Question 16

16 The flame photometer is used to find the concentration of ions. What else is it used for?

Answer 16

to identify ions

Question 17

17 Name the type of graph needed to find the concentration of ions when using a flame photometer.

Answer 17

calibration curve

Question 18

18 A substance turns red litmus paper blue. What does this tell you about the substance?

Answer 18

it is alkaline/an alkali

Question 19

19 Which ion has the formula NH₄⁺?

Answer 19

ammonium ion

Question 20

20 Which of these substances is insoluble in water: aluminium hydroxide or sodium hydroxide?

Answer 20

aluminium hydroxide

Question 21

21 Give the flame test colour for copper ions.

Answer 21

blue-green

Question 22

22 Which metal ion produces a yellow flame test colour?

Answer 22

sodium

Question 23

23 What colour is the precipitate produced when sodium hydroxide is added to Fe²⁺ ions?

Answer 23

green

Question 24

24 Which white precipitate disappears to form a colourless solution when excess sodium hydroxide is added: aluminium hydroxide or calcium hydroxide?

Answer 24

aluminium hydroxide

Question 25

25 What colour is the precipitate produced when sodium hydroxide is added to copper ions?

Answer 25

blue

Question 26

26 In the chemical test for ammonia gas, should the red litmus paper be dry or damp?

Answer 26

damp

Question 27

27 What solution turns milky in the chemical test for carbon dioxide?

Answer 27

limewater

Question 28

28 Which ion has the formula SO₄^2–?

Answer 28

sulfate ion

Question 29

29 Which of these substances is insoluble in water: sodium chloride or silver chloride?

Answer 29

silver chloride

Question 30

30 What gas is produced when calcium carbonate reacts with dilute hydrochloric acid?

Answer 30

carbon dioxide

Question 31

31 Are metals shiny or dull when freshly cut?

Answer 31

shiny

Question 32

32 What type of bond (ionic, metallic or covalent) involves a pair of electrons?

Answer 32

covalent

Question 33

33 When a substance is compressed, is it being squashed or stretched?

Answer 33

squashed

Question 34

34 Can you see through an opaque substance?

Answer 34

no

Question 35

35 Which element forms long chains in simple polymers such as polyethene

Answer 35

carbon

Question 36

36 Which is a better electrical conductor: metal or brick?

Answer 36

metal

Question 37

37 What name is given to a mixture of metals?

Answer 37

alloy

Question 38

38 Is solid glass malleable, ductile or brittle?

Answer 38

brittle

Question 39

39 Which is a better thermal conductor: polyehene or copper?

Answer 39

copper

Question 40

40 What type of bond ionic, metallic or covalent) involves the transfer of electrons?

Answer 40

ionic

Question 41

41 Which substance is a better electrical conductor: PVC or copper?

Answer 41

copper

Question 42

42 What word describes a substance that can be hammered or rolled into shape?

Answer 42

malleable

Question 43

43 What word describes a substance that can be stretched into wires?

Answer 43

ductile

Question 44

44 When a substance is under tension, is it being squashed or stretched?

Answer 44

stretched

Question 45

45 Can you see clearly through a transparent substance?

Answer 45

yes

Question 46

46 What metal forms the rods inside reinforced concrete?

Answer 46

steel/iron

Question 47

47 Which is denser: steel or polyethene?

Answer 47

steel

Question 48

48 What are the thin strands in fibreglass made from?

Answer 48

glass

Question 49

49 Name the type of material that consists of thin sheets of wood glued together.

Answer 49

plywood

Question 50

50 What hard material is made by mixing cement, sand, small stones and water together?

Answer 50

concrete

Question 51

51 Is a molecule larger than an atom?

Answer 51

yes

Question 52

52 Which reacts faster with an acid: limestone as a powder or as a lump?

Answer 52

powder

Question 53

53 What does a catalyst do to the rate of a reaction?

Answer 53

(increases/changes it

Question 54

54 Are clay ceramics electrical conductors or insulators?

Answer 54

insulators

Question 55

55 What is the main property of glass that makes it suitable for window panes?

Answer 55

it is transparent.

Question 56

56 What is the symbol for a nanometre?

Answer 56

nm

Question 57

57 How many nanometres are there in a metre?

Answer 57

thousand million/billion/10⁹

Question 58

58 What three measurements do you need to calculate the surface area of a cuboid?

Answer 58

length, width, height

Question 59

59 What measurement do you need to calculate the volume of a cube?

Answer 59

length of a side

Question 60

60 How much catalyst is left at the end of a reaction?

Answer 60

all of it/the same as at the start