Inorganic chemistry (topic 2)

Question 1

Acid

Answer 1

produces hydrogen ions (H+) in aqueous solutions they have a pH range between 0 and 7 known as proton donors

Question 2

Alkali

Answer 2

produces hydrogen ions (H-) in aqueous solution they have a pH range between 7 and 14 they are soluble bases

Question 3

Alkali metals

Answer 3

elements in group 1 of the periodic table typically soft and relatively low melting points

Question 4

Base

Answer 4

a substance which reacts with an acid in a neutralisation reaction to form a salt and water

Question 5

Climate change

Answer 5

change in global climate due to increased concentration of CO2 in the atmosphere

Question 6

Combustion

Answer 6

burning of a substance in oxygen

Question 7

Displacement

Answer 7

more reactive element displaces a less reactive element from its compound

Question 8

Flame test

Answer 8

identifies metal ions. insert a wire loop with unknown compound onto a flame and observe colour

Question 9

Galvanise

Answer 9

process used to protect again corrosion by coating the metal with a protective layer of zinc

Question 10

Greenhouse effect

Answer 10

increase in temperature of the Earths atmosphere due to greenhouse gases trapping info-red radiation from the surface

Question 11

Greenhouse gases

Answer 11

water vapour, CO2 and methane

Question 12

Halides

Answer 12

ions formed by halogen atoms

Question 13

Halogens

Answer 13

element in group 7. get more reactive down the group and higher boiling and melting points

Question 14

Indicators

Answer 14

chemical used to distinguish between acidic and alkaline solutions

Question 15

Neutralisation

Answer 15

reaction in which an acid and a base react to form a salt and water

Question 16

Oxidation

Answer 16

reaction involving gain of oxygen and loss of electrons

Question 17

Oxidising agent

Answer 17

oxidation by gaining electrons

Question 18

pH scale

Answer 18

measure of acidity and alkalinity of a solution from 0-14

Question 19

Reactivity series

Answer 19

series in which metals are arranged in order of their reactivity

Question 20

Redox reaction

Answer 20

reaction in which oxidation and reduction occur simultaneously

Question 21

Reducing agent

Answer 21

reduction by loosing electrons

Question 22

Reduction

Answer 22

reaction involving loss of oxygen and gain of electrons

Question 23

Rust

Answer 23

reddish coating of iron oxide which forms on iron when it undergoes oxidation

Question 24

Sacrificial protection

Answer 24

protection against corrosion by using a more reactive metal

Question 25

Thermal decomposition

Answer 25

breaking down of a compound by heating

Question 26

Universal indicator

Answer 26

mixture of dyes that changes colour gradually over a range of pH to test for acids and alkalies