tests for substances (starch, lipids, reducing sugars, protein) - SB1

Question 1

What does the iodine test show for?

Answer 1

starch

Question 2

what does the benedict test search for?

Answer 2

Reducing sugars

Question 3

what does the ethanol test search for?

Answer 3

lipids

Question 4

what does the biuret test show for?

Answer 4

protein

Question 5

what is a positive result for iodine?

Answer 5

blue-black

Question 6

negative result for iodine test?

Answer 6

no colour change

Question 7

positive result for biuret?

Answer 7

purple

Question 8

negative result for biuret?

Answer 8

light blue

Question 9

what chemical is used in the biuret test?

Answer 9

potassium hydroxide

Question 10

what is a positive test for benedicts?

Answer 10

red

Question 11

what is a negative result for benedicts?

Answer 11

blue

Question 12

what is a positive result for ethanol?

Answer 12

cloudy emulsion

Question 13

what is a negative result for ethanol

Answer 13

colourless emulsion

Question 14

what chemical is used in benedict’s test?

Answer 14

benedict’s solution

Question 15

which test do you need a hot water bath for?

Answer 15

benedicts

Question 16

What is a calorimeter?

Answer 16

a devise that measures the amount of energy in food by burning it

Question 17

What equipment is needed to set up a calorimeter

Answer 17

thermometer, stirrer, clamp, calorimeter, water and food sample on stick

Question 18

What does a calorimeter measure?

Answer 18

how much heat is released by food (more heat = more energy)