Group 7

Question 1

First Ionisation E trend in G7

Answer 1

Decrease down the group,
- More radius
-More Shielding

Question 2

reactivity trend in G7

Answer 2

Decrease, Down the group

Question 3

Boiling . Trend in G7

Answer 3

Increase down
-More e-
-More London
Harder to pull apart

Question 4

Halides and Silver Nitrate Reactions + Ammonium

Answer 4

Cl- White Precipitate (soluable (both))
Br- Cream (soluable (only conc))
I- Yellow

Question 5

Oxidising Power of G7

Answer 5

Decrease down the group, Halide will displace ones underneath

Question 6

Atomic Radius G7 trend

Answer 6

Increase, Down the group

Question 7

SO4 2- test with halides

Answer 7

+ Ba Cl2 —>. White Precipitate

Question 8

OH- test

Answer 8

red litmus paper —> Blue

Question 9

CO3 2- test

Answer 9

+ HNO3 –> CO2 gas forms

Question 10

Factors that affect first ionisation energy

Answer 10

• Shielding,
• Nuclear Charge
• Atomic Radius

Question 11

How do G7 react

Answer 11

Are reduced (gain 1 e-), (electron acceptors / oxidisng agents)

Question 12

Uses Of Cl

Answer 12

• Bleach
• Water Purification

Question 13

order of anion tests

Answer 13

1. Carbonate (Solution + Dilute Nitric acid NOT HCL as this would interfere)
2. Sulfate (barium nitrate forms Barium sulphate)
3. halide test (Silver Nitrate)

Question 14

Colour of Halides in solution

Answer 14

Cl- pale green/yellow
Br- Orange
I- Brown

Question 15

Colour of Halides with Cyclohexane

Answer 15

Cl- yellow/green
Br- Yellow
I- Purple
Iodine is usually the one seen as it is displaced and put into the organic layer showing a purple colour.