organic compounds

what is the chemical used to test for simple sugars

• Biuret test

• Sudan III test

• Iodine test

• Benedict's test

Answer explanation

Benedict's test is used to test for simple sugars. It is a chemical test that involves the reaction of reducing sugars with Benedict's reagent, resulting in a color change from blue to green, yellow, orange, or red, depending on the concentration of sugar present.

what does the positive test for simple sugars look like

• The solution becomes cloudy

• The solution forms a precipitate

• The solution changes color to yellow/red/orange/green

• The solution emits a foul odor like rotten eggs

Answer explanation

The positive test for simple sugars is indicated by a color change to yellow/red/orange/green.

Tags

NGSS.HS-PS1-2

what is the chemical used to test for proteins

• Biuret reagent

• Potassium permanganate

• Hydrochloric acid

• Sodium hydroxide

Answer explanation

Biuret reagent is the chemical used to test for proteins. It reacts with proteins to produce a violet color, indicating the presence of proteins.

what does the positive test for protein look like

• Color change from blue to violet/lavender

• Color change from violet/lavender to blue

• No color change

• Color change from blue to green

Answer explanation

The positive test for protein is indicated by a color change from blue to violet/lavender.

what is the chemical used to test for starch

• sodium chloride

• hydrogen peroxide

• iodine

• sulfuric acid

Answer explanation

Iodine is the chemical used to test for starch. It reacts with starch to produce a blue-black color, indicating the presence of starch.

what does the positive test for lipids look like

• A color change, a red/pink layer forms

• A green color change

• No change in color

• A sound is produced

Answer explanation

The positive test for lipids is indicated by a color change, specifically a red/pink layer forms.

what chemical is used to test for lipids

• Benedict's solution

• Iodine solution

• Silver nitrate

• Sudan III

Answer explanation

Sudan III is the chemical used to test for lipids. It is the correct choice because it specifically reacts with lipids, producing a red color.

what is this

• lipid

• carb

• protein

• nucleic acid

what is this

• lipid

• carb

• protein

• nucleic acid

Tags

NGSS.HS-LS1-6

what is this

• lipid

• carb

• protein

• nucleic acid

Tags

NGSS.HS-LS1-6