Chemistry AP3

Question 1

what ways is energy transferred to the surroundings in a combustion reaction

Answer 1

heat and light

Question 2

what is made in the complete combustion of a fuel like methane

Answer 2

carbon dioxide and water

Question 3

name of a chemical reaction where a compound breaks down on heating

Answer 3

thermal decomposition

Question 3

type of reaction that transfers energy to the surroundings

Answer 3

exothermic

Question 4

name the type of reaction that transfers energy from the surroundings

Answer 4

endothermic

Question 5

what is a chemical bond

Answer 5

a force that holds atoms together

Question 6

what is a catalyst

Answer 6

something that speeds up a chemical reaction but remains unchanged at the end

Question 7

which are corrosive - acids or alkalis

Answer 7

both

Question 8

what element do all acids contain

Answer 8

hydrogen

Question 9

what is a base

Answer 9

a substance that neutralises an acid

Question 10

what is an alkali

Answer 10

a base that dissolves in water

Question 11

what do all alkalis contain

Answer 11

hydroxide group or oh

Question 12

acid + metal =

Answer 12

salt + hydrogen

Question 13

acid + alkali =

Answer 13

salt + water

Question 14

acid + metal carbonate =

Answer 14

salt + water + carbon dioxide

Question 15

are metal oxides - acids or bases?

Answer 15

bases

Question 16

when you make a solution what is the scientific name for the solid you dissolve into the liquid

Answer 16

solute

Question 17

name for a liquid that you can dissolve a substance in

Answer 17

solvent

Question 18

what technique is used to seperate a mixture of coloured inks

Answer 18

chromatography