Prac exam prep

Question 1

What catalyst + conditions is used for hydrogenation?

Answer 1

Nickle

Question 2

What catalyst + condition is used for the hydration of alcohol?

Answer 2

Phosphoric acid 300*c

Question 3

What catalyst is used for dehydration of alcohol?

Answer 3

Conc sulfuric acid

Question 4

What catalyst is used for the oxidation of alcohols?

Answer 4

Acidified potassium dichormate

Question 5

What is the enthalpy change equation?

Answer 5

q=mc∆T (NEGATIVE)

Question 6

What are the conditions of alkane cracking?

Answer 6

Zeolite catalyst and 450*c

Question 7

What catalyst is used for the esterification of alcohols?

Answer 7

Conc sulfuric acid

Question 8

What is the flame test colour for Lithium?

Answer 8

Red

Question 9

What is the flame test colour for Sodium?

Answer 9

Orange yellow

Question 10

What is the flame test colour for potassium?

Answer 10

Lilac

Question 11

What is the flame test colour for calcium?

Answer 11

Brick red

Question 12

What is the flame test colour for strontium?

Answer 12

Crimson

Question 13

What is the flame test colour for Barium?

Answer 13

Apple green

Question 14

What are the 4 solubility trends for group 2 compounds?

Answer 14

All nitrates are soluble
All carbonates are insoluble
Hydroxides increase in solubility down the group
Sulphates decrease in solubility down the group

Question 15

Wat is used as a test for halides?

Answer 15

Nitric acid followed by silver nitrate then aqueous ammonia

Question 16

What are the 3 observations from the halide test?

Answer 16

Cl- White ppt that dissolves
Br- Cream ppt that partially dissolves
I- Yellow ppt that is insoluble

Question 17

What is observed when CCl4 reacts with water?

Answer 17

an immiscible mixture is formed
layers are observed with ccl4 on top

Question 18

What is observed when SiCl4 reacts with water?

Answer 18

White ppt of Si(OH)4
Misty fumes of HCl

Question 19

What is observed when PbCl4 reacts with hot and cold water?

Answer 19

No reaction in cold
Sparingly soluble in hot- colourless solution with white solid

Question 20

What is observed when lead and iodine react?

Answer 20

Canary yellow ppt

Question 21

What is observed when NaCl and H2SO4 react?

Answer 21

HCl misty fumes

Question 22

What is overserved when HBr and H2SO4 react?

Answer 22

Misty fumes of HBr
Yellow orange solution (Br) and Chocking gas (SO2)

Question 23

What is observed when NaI and H2SO4 react?

Answer 23

HI misty fumes
Orange brown solution (I2) and rotten egg smell (H2S)
I2 grey solid
I2 purple gas

Question 24

What is the OH+ ligand colour change for Cu 2+?

Answer 24

Blue to pale blue

Question 25

What is the OH+ ligand colour change for Fe 2+?

Answer 25

Pale green to dirty green

Question 26

What is the OH+ ligand colour change for Fe 3+?

Answer 26

Yellow to rust brown

Question 27

What is the OH+ ligand colour change for Co 2+?

Answer 27

Pink to blue

Question 28

What is the OH+ ligand colour change for Cr 3+?

Answer 28

Green to grey green

Question 29

What is the NH3 ligand colour change for Cu 2+?

Answer 29

Pale blue to royal blue

Question 30

What catalyst is used to form alcohols from halogenoalkanes?

Answer 30

Reflux with NaOH

Question 31

What is used to reduce aldehydes and ketones?

Answer 31

NaBH4

Question 32

What is used to reduce Carboxylic acids?

Answer 32

LiAlH4

Question 33

What is observed when phenol reacts with bromine?

Answer 33

White ppt and decolourised bromine water (Orange to clear)

Question 34

What is the test for phenol?

Answer 34

Aqueous iron III Chloride gives a purple colour

Question 35

What is tollens reagent, what does it test for and what is observed in a positive result?

Answer 35

Ammoniacal silver nitrate Aldehyde presence Colourless to Silver ppt

Question 36

What is Fehling's solution, what does it test for and what does a positive result look like?

Answer 36

Cu 2+ complex Aldehyde presence Blue to Brick red

Question 37

What is 2,4-DNP, what does it test for and what does a positive result look like?

Answer 37

2,4-Dinitrophenylhydrazine Aldehydes and ketones Yellow orange ppt

Question 38

What is iodoform, what does it test for and what does a positive result look like?

Answer 38

Iodine and aqueous sodium hydroxide CH3CO Yellow ppt of CHI3

Question 39

What catalyst is used for decarboxylation?

Answer 39

Strong heating with Soda Lime (NaOH)

Question 40

What catalyst and conditions are used for the formation of aromatic carboxylic acids?

Answer 40

Heat with alkaline potassium manganate(VII) then add HCl

Question 41

What catalyst is used to form acid chlorides from carboxylic acids?

Answer 41

Phosphorous Pentachloride PCl5 (Dry)

Question 42

What catalyst is used to from amides from Carboxylic acids?

Answer 42

Ammonium carbonate followed by heating with Phosphorous V Oxide P4O10

Question 43

What catalyst is used for the halogenation of benzene?

Answer 43

Bromine- iron III Bromide Chlorine- Aluminium chloride

Question 44

what catalyst is used for the nitration of benzene?

Answer 44

H2SO4

Question 45

What reagent is used to from aromatic amines?

Answer 45

Tin and conc Hydrochloric acid Heated under reflux followed by NaOH

Question 46

What are the 5 solubility rules?

Answer 46

All nitrates are soluble all ammonium and alkali are soluble all carbonates, phosphates and hydroxides are insoluble (Bar those with rule 1 or 2) All chlorides, bromides and iodides are soluble except with Ag, Pb or Hg All sulphate are soluble exept with group Ca, Sr, Ba, Ra or Pb