Group 7 Halogens

Question 1

Trend of electronegativity in halogens

Answer 1

Decreases
More shielding due to greater atomic radius
Weaker forces of attraction

Question 2

Trend in boiling points

Answer 2

Increases
Stronger van der Waals forces
As greater mass down the group

Question 3

Trend in oxidising power

Answer 3

Decreases so Cl- has greatest oxidising power

Question 4

The test to test for oxidising power with halogens

Answer 4

Adding halide to halogen

Question 5

Trend in reducing ability

Answer 5

Increases, so I- has greatest reducing ability because I- has greater shielding, more likely to lose its electron