Reactivity of halogens - Phoenix Hoyle | Library

4

How does the equation show that bromine is more reactive than iodine?

The ____________  displaces the ___________  from the solution and a _________  reactive element will take the place of a _________  reactive element in a displacement reaction.

Other Answer Choices:

bromide

bromine

less

iodine

iodide

more

1

(i) How do the diagrams show that both bromine and iodine are elements?

Bromine molecule _________  contains ____________  atoms 
 iodine molecule _________  contains ___________  (atoms);

Other Answer Choices:

only

iodine

bromine

1

(ii) How do the diagrams show that both bromine and iodine have diatomic molecules?

The halogen molecules are made up of ________non-metal __________ joined by a covalent bond.

Other Answer Choices:

two

atoms

6

Add Chlorine water to potassium bromide solution
Colour change from _______________to ___________  so chlorine is more reactive than bromine
(Add petroleum ether __________ layer forms).
______ KBr → Br₂ + ______ 2KCl

Cl2  +   2KI I2 + 2KCl
Add Chlorine water to potassium iodide solution
chlorine + potassium iodide gives __________solution.
Add petroleum ether and ___________ top layer forms.

Other Answer Choices:

purple

orange

2

brown

pale green