FOOD TESTS

Question 1

SOLUTION USED TO TEST FOR STARCH

Answer 1

IODINE SOLUTION

Question 2

SOLUTION USED TO TEST FOR PROTEINS

Answer 2

BIURET SOLUTION

Question 3

SOLUTION USED TO TEST FOR FATS

Answer 3

ETHANOL SOLUTION AND THEN DISTILLED WATER

Question 4

SOLUTION USED TO TEST FOR VITAMIN C

Answer 4

DCPIP

Question 5

SOLUTION USED TO TEST FOR REDUCING SUGARS

Answer 5

BENEDICT’S SOLUTION

Question 6

Why add distilled water for the ethanol emulsion test?

Answer 6

Lipids are insoluble in water and soluble in ethanol.

Question 7

Order of the reducing sugar color changes…

Answer 7

Blue,green,yellow,orange,brick red

Question 8

What’s the color of iodine?

Answer 8

Brownish

Question 9

What color does a positive result of starch give?

Answer 9

Blue-black color

Question 10

What color does a positive result for reducing sugar give?

Answer 10

Blue,green,yellow,orange,brick red

Brick red *a large amount of reducing sugar present

Question 11

What color does a positive result of protein give?

Answer 11

Purple

Question 12

What observation does a positive result of fat give?

Answer 12

White emulsion

Question 13

What color does a positive result of vitamin c give?

Answer 13

Colorless

Question 14

When testing for reducing sugars, should you heat the sample or warm the sample?

Answer 14

Heat the sample *writing warm deducts marks

Question 15

Try explaining emulsion

Answer 15

the tiny dispersed droplets in the water when distilled water is added to the ethanol and sample mixture.