Halogens

Question 1

What is fluorine at room temperature?

Answer 1

Pure yellow gas

Question 2

What is chlorine at room temperature?

Answer 2

Green gas

Question 3

What is bromine at room temperature?

Answer 3

Red/ brown liquid

Question 4

What is iodine at room temperature?

Answer 4

Black solid

Question 5

What is astatine?

Answer 5

Solid

Question 6

What are halogens?

Answer 6

Diatomic

Question 7

What do halogens form?

Answer 7

Halides

Question 8

What are the trends of Electronegativity?

Answer 8

Decreases down group 7

This is because more full shells and increase shielding and increased atomic radius.

Question 9

What are the trend of boiling point?

Answer 9

Increases as you go down a group

Question 10

Explain. Why boiling point increases as you go down halogens

Answer 10

More electrons is stronger van der waal s forces which means more energy is required to break them.

Question 11

What are trends in oxidising ability?

Answer 11

Decreases as you go down the group

Question 12

Which halogen is the strongest oxidising agent?

Answer 12

Florine

Question 13

What are the trends in reducing ability?

Answer 13

Increases down a group

Question 14

Which ha,Ogden is the strongest reducing agent?

Answer 14

Iodine

Question 15

Identification of Halide ions

Answer 15

Add dilute nitric acid
Add silver nitrate.

Question 16

What does AgF from

Answer 16

No precipitate

Question 17

What does AgCl form

Answer 17

White precipitate

Question 18

What does AgBr form

Answer 18

Cream coloured precipitate

Question 19

What does AgI form

Answer 19

Pale yellow precipitate

Question 20

After adding dilute ammonia what turns colourless

Answer 20

AgCl

Question 21

After adding concentrated ammonia what turns colourless

Answer 21

AgBr