M8 to M10 Experiments

Question 1

Reaction with Heat test samples

Answer 1

albumin, casein, gelatin

Question 2

Result of Albumin in when heated

Answer 2

cloudy, white ppte coagulate

Question 3

result of casein when heated

Answer 3

clear

Question 4

result of gelatin when heated

Answer 4

clear no reaction w/n hot but coagulates when cold

Question 5

factors that cause denaturation

Answer 5

heavy metals, alkaloidal reagents, concentrated acids, alkali, organic solvent

Question 6

Reaction with Heavy Metals

Answer 6

AgNO3, HgCL2, PbAc2

Question 7

reaction of AgNO3 with egg albumin

Answer 7

white ppt

Question 8

reaction of HgCL2 with egg albumin

Answer 8

white ppte

Question 9

reaction of PbAc2 with egg albumin

Answer 9

black ppte

Question 10

Alkaloidal reagents

Answer 10

Picric Acid, Tannic Acid, TCA

Question 11

reaction of picric acid with albumin

Answer 11

yellow ppte

Question 12

reaction of tannic acid with albumin

Answer 12

white/brown ppte

Question 13

reaction of TCA with albumin

Answer 13

white ppte

Question 14

concentrated acids

Answer 14

HNO3, HCl

Question 15

Alcohol percentages

Answer 15

95%, 70%, 40%

Question 16

reaction of 95% ethanol

Answer 16

mostly cloudy/ max ppte

Question 17

reaction of 70% ethanol

Answer 17

moderately cloudy

Question 18

reaction of 40% ethanol

Answer 18

least cloudy/ min ppte

Question 19

positive result of Activity of Amylase

Answer 19

blue

Question 20

negative result of activity of amylase

Answer 20

yellow/brown stays the same

Question 21

Saliva + ? + I2 soln

Answer 21

starch

Question 22

test to detect the presence of reducing sugars

Answer 22

Fehlings A and B

Question 23

positive result of Fehlings A and B

Answer 23

brick red ppte

Question 24

Saliva + Starch + ? + Fehlings A and B

Answer 24

Iodine solution

Question 25

testing for aldehydes and reducing sugars

Answer 25

Fehlings Test

Question 26

A soln containing copper (II) sulfate

Answer 26

Fehlings A

Question 27

a clear liquid consisting of potassium sodium tartrate + sodium hydroxide

Answer 27

Fehlings B

Question 28

Fehlings Test Reagent

Answer 28

Fehlings A and B

Question 29

positive result of fehlings test

Answer 29

brown

Question 30

negative result of fehlings

Answer 30

no reaction

Question 31

test samples of fehlings test

Answer 31

glucose, sucrose

Question 32

positive test samples of fehlings test

Answer 32

glucose and sucrose in citric acid

Question 33

to detect an aldehyde group or sometimes alpha-hydroxy ketone

Answer 33

tollen’s test

Question 34

tollen’s reagent

Answer 34

Agno3 + NH4OH + NaOH

Question 35

positive result of tollen’s test

Answer 35

silver mirror

Question 36

test sample of tollen’s test

Answer 36

dextrose

Question 37

is dextrose positive result for tollen’s test

Answer 37

yes

Question 38

tests to detect phosphates

Answer 38

Dry heating test, Independent Radicals Test, Magnesia Mixture Test, confirmatory test of phosphate

Question 39

positive result of dry heating test

Answer 39

voluminous mass

Question 40

positive result of independent radicals test

Answer 40

yellow ppte

Question 41

positive result of magnesia mixture test

Answer 41

white ppte

Question 42

special test for purines

Answer 42

Uric acid test

Question 43

extracted from yeast

Answer 43

test to detect RNA

Question 44

positive result of yeast extract + NaOH + CuSO4

Answer 44

violet soln

Question 45

result of hydrolyzate + NaOH + AgNO3

Answer 45

light brown ppte

Question 46

result of hydrolyzate + bial’s orcinol

Answer 46

blue/green soln

Question 47

test to detect chemical presence of pentoses

Answer 47

bials orcinol test

Question 48

bials orcinol reagent

Answer 48

orcinol + hydrochloric acid + ferric chloride

Question 49

positive result of bials orcinol

Answer 49

blue/green soln

Question 50

negative result of bials orcinol test

Answer 50

muddy brown soln

Question 51

test samples of bials orcinol

Answer 51

ribose and gluce

Question 52

is ribose positive in bials orcinol

Answer 52

yes

Question 53

is glucose positive in bials orcinol

Answer 53

no it is negative