Group 7

Question 1

What is fluorines appearance in water and non polar solvent

Answer 1

Colourless

Question 2

What is chlorines appearance in water and non polar solvent?

Answer 2

Very pale green solution

Question 3

What is the appearance of all the halide ions?

Answer 3

White solid or colourless solution

Question 4

What is the atomic radius going down group 7

Answer 4

Increases-extra shell of electrons

Question 5

What is the natural state of bromine?

Answer 5

Orange liquid

Question 6

What happens to the melting point as you descend group 7?

Answer 6

Increases-more energy needed to overcome the stronger Van Der Waals forces due to the increase of electrons

Question 7

What is the natural state of chlorine?

Answer 7

Pale yellow gas

Question 8

What is iodines appearance in water and non polar solvent

Answer 8

W-brown solution

NPS - purple solution

Question 9

What happens to the electronegativity of the elements descending g7

Answer 9

Decreases-bigger atomic radius and more shielding between nucleus and outer shell. There’s a weaker attraction between nucleus and the bonded electrons

Question 10

What is bromines appearance in water and non polar solvent?

Answer 10

Orange solution

Question 11

What happens to the reactivity of group 7 going down?

Answer 11

Decreases- going down the group the atoms are larger with more shielding between nucleus and outershell electrons
Weaker attraction between nucleus and electron being gain

Question 12

Which is the most powerful oxidising agents

Answer 12

Fluorine

Question 13

What is the most powerful reducing agent?

Answer 13

Iodine

Question 14

What is the natural state of iodine?

Answer 14

Black solid

Question 15

What does fluorine displace?

Answer 15

Cl Br I

Question 16

What does cl displace

Answer 16

Br I

Question 17

What does bromine displace?

Answer 17

I

Question 18

What does I displace

Answer 18

Fuck all

Question 19

How does cl2 react with water?

Answer 19

Cl2(g)+h20(l)—–>Hcl(aq)+HClo(aq)

Chloric (I) acid

Question 20

Why is cl2 used in water?

Answer 20

Kills bacteria

Question 21

Why do some people appose using cl2 in water?

Answer 21

If you add too much it becomes toxic and leaves traces of chlorinated hydrocarbons

Question 22

What happens when you add dilute sodium hydroxide to chlorine?

Answer 22

Cl2(g)+2NaOH(aq)---> nacl(aq)+Naclo(aq)+H2O(l)
Sodium chlorate (I)

Question 23

What happens when cl2 reacts with hot concentrated NaOH

Answer 23

6NaOH+3Cl2—> naclo3 + 5Nacl + 3H20

Question 24

What happens to Cl- reacts with silver nitrate?

Answer 24

Silver chloride white precipitate

Question 25

What happens to silver chloride when dilute NH3 is added

Answer 25

Precipitate dissolves

Question 26

What happens when silver nitrate is added to Br-

Answer 26

Silver bromide cream precipitate

Question 27

What happens when you add dilute NH3 to silver bromide?

Answer 27

Precipitate doesn't dissolve

Question 28

What happens when concentrated NH3 is added to silver bromide?

Answer 28

Precipitate dissolves

Question 29

What happens when you add silver nitrate to iodine?

Answer 29

Silver iodide yellow precipitate

Question 30

What happens when you add dilute or concentrated NH3 to silver iodide?

Answer 30

Precipitate doesn't dissolve

Question 31

What is the natural state of fluorine?

Answer 31

Colourless gas