Chemical Properties of Glucose

Q.

What is Seliwanoffs Test?

Q.

Glucose reacts with Tollen’s reagent to give a derivative of:

1. Monocarboxylic acid

2. Dicarboxylic acid

3. Ketone

4. Keto acid

Q. Synthesis of each molecule of glucose in photosynthesis involves

1. 18 molecules of ATP
2. 10 molecules of ATP
3. 8 molecules of ATP
4. 6 molecules of ATP

Q. Which of the following pairs give positive Tollens’ test?

1. Sucrose, glucose
2. Fructose, sucrose
3. Fructose, glucose
4. Starch, maltose

Q. Benedict’s test is conducted to confirm the presence of :

1. polysaccharides like starch
2. lipids
3. reducing sugars
4. proteins

Q. what is the oxidation no. of Cl in HClO4?

Q.

Glucose does not react with:

1. HCN

2. Phenylhydrazine

3. Hydroxylamine

4. Sodium bisulphite

Q.

Which is true about the acidic character of hydroxyl groups of sugars and hydroxyl group of an alcohol ?

1. The OH's of sugars are more acidic than that of a typical alcohol

2. The OH's of sugars are less acidic than that of a typical alcohol

3. Both have similar acidic character

4. The OH's of sugars are netral while that of an alcohol is acidic

Q.
The sum of total number of moles of $PhNHN{H}_2$ used with A and B is

Q.

When an aqueous solution of D - glucose or D - mannose is treated with a base it undergoes some conversions. This conversion (isomerisation) involves

1. Enolization

2. Tautomerization

3. Both (a) and (b)

4. None of the two

Q.

Which is true about the acidic character of hydroxyl groups of sugars and hydroxyl group of an alcohol ?

1. The OH's of sugars are more acidic than that of a typical alcohol

2. The OH's of sugars are less acidic than that of a typical alcohol

3. Both have similar acidic character

4. The OH's of sugars are netral while that of an alcohol is acidic

Q.

What will happen when D - (+) - glucose is treated with methanolic - HCl followed by Tollens' reagent ?

1. A black ppt. will be formed

2. A red ppt. will be formed

3. A green colour will appear

4. No characteristic colour or ppt. will be formed

Q. In the given reaction
Glucose + n (Phenylhydrazine) $\to$ Osazone
The value of n is:

1. Three
2. Two
3. One
4. Four

Q. Which of the following is a reducing sugar?

1. Galactose
2. Gluconic acid
3. 3-Methyl galactoside
4. Sucrose