Group 7 Rules

Question 1

State of F2 at rtp

Answer 1

Gas

Question 2

State of Cl2 at rtp

Answer 2

Gas

Question 3

State of Br2 at rtp

Answer 3

Liquid

Question 4

State of I2 at rtp

Answer 4

Solid

Question 5

Mp of group 7 — down the group

Answer 5

Increases

Question 6

Bp of group 7 — down the group

Answer 6

Increases

Question 7

Electronegativity — down the group

Answer 7

Decreases

Question 8

Explain why F2 has greater en

Answer 8

• smaller atomic radius
• less shielding
• more electrostatic force to electrons

Question 9

State what agent halogen is

Answer 9

Oxidising agent

Question 10

Reactivity of halogen — down the group

Answer 10

Decreases

Question 11

State the factors of affecting electronegativity

Answer 11

1. Nuclear charge
2. Proximity of nucleus to electrons
3. Shielding

Question 12

State what will be formed when:
Cl2 + 2KI
Reacts

Answer 12

2KCl + I2 will be formed

Question 13

State the name of this reaction and explain :
Cl2 + H2O -> HCl + HClO

Answer 13

Disproportionation,
The oxidation number has changed to both -1 and 1 respectively from 0

Question 14

state the reaction of chlorine and cold alkali

Answer 14

Cl2 + 2NaOH -> NaCl + NaClO + H2O
Disproportionation

Question 15

State the reaction of chlorine reacting with hot alkali

Answer 15

3Cl2 + 6NaOH -> 5NaCl + NaClO3 + 3H2O
Disproportionation