Question

Glucose can be tested by ______ reagent.

• A. Tollens
• B. Benedicts
• C. Iodine
• D. Both (a) and (b) above

Answer 1

The correct option is D Both (a) and (b) above

Tollens Test:-

• Tollens’ test, also known as silver-mirror test, is a qualitative laboratory test used to distinguish between an aldehyde and a ketone.
• It exploits the fact that aldehydes are readily oxidized (see oxidation), whereas ketones are not.
• Tollens’ test uses a reagent known as Tollens’ reagent, which is a colorless, basic, aqueous solution containing silver ions coordinated to ammonia $\left[Ag\right(N{H}_3{)}^{2+}]$
  

Benedict Test:-

• Benedict's Test is used to test for simple carbohydrates.
• The Benedict's test identifies reducing sugars (monosaccharide's and some disaccharides), which have free ketone or aldehyde functional groups.
• Benedict's solution can be used to test for the presence of glucose in urine.