Chemistry Y08 Spr1

Question 1

1.1 Where are alkali metals found in the periodic table?

Answer 1

Group 1

Question 2

1.2 State the trend in reactivity as you go down group 1

Answer 2

Increasing reactivity

Question 3

1.3 Give the properties of the group 1 metals that are unusual compared to other metals

Answer 3

Soft, low density and low melting points

Question 4

1.4 Where are the Halogens found on the periodic table

Answer 4

Group 7

Question 5

1.5 State the trend in reactivity as you go down group 7

Answer 5

Decreasing reactivity

Question 6

1.6 State the trend in the boiling points of the Halogens as you down the group?

Answer 6

Increases

Question 7

1.7 Define the term exothermic

Answer 7

Energy is released to surroundings and temperature increases

Question 8

1.8 Define the term endothermic

Answer 8

Energy is taken in from surroundings and temperature decreases

Question 9

1.9 Name a suitable piece of equipment that could be used to measure temperature changes

Answer 9

Thermometer

Question 10

1.1 What is meant by a thermal decomposition reaction

Answer 10

A reaction where a substance is broken down by heat

Question 11

1.2 Describe the test for carbon dioxide gas

Answer 11

Bubble through lime water, which will turn cloudy

Question 12

1.3 Are thermal decomposition reactions exo or endothermic?

Answer 12

Endothermic

Question 13

1.4 Define the term ‘displacement reaction’

Answer 13

When a more reactive element displaces a less reactive element from a compound

Question 14

1.5 We can predict whether a displacement reaction will occur using a……

Answer 14

Reactivity series

Question 15

1.6 A substance that changes colour in acid or alkali is known as an……

Answer 15

indicator

Question 16

1.7 What pH values do acids have?

Answer 16

Less than 7

Question 17

1.8 What pH values do alkalis have?

Answer 17

Above 7

Question 18

1.9 Define “neutralisation”

Answer 18

The reaction of an acid with an alkali to form a neutral salt and water

Question 19

1.1 Recall the general equation for a neutralisation reaction

Answer 19

Acid + alkali -> salt + water