Structure of Glucose

Q.

Which of the following statements is not true about glucose?
(a) It is an aldohexose
(b) On heating with HI, it forms n-hexane
(c) It is present in furanose form
(d) It does not give 2, 4- DNP test

Q.

Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence of -

1. six carbon atoms linked in straight chain

2. secondary alcoholic group in glucose

3. aldehyde group in glucose

4. primary alcoholic group in glucose

Q.

In the reaction of glucose with hydroxyl amine and glucose with hydrogen cyanide how was it conuded that glucose has only one carbonyl group ?

Q.

Under what condition glucose is converted to gluconic acid and saccharide acid?

Q.

In Ostwald’s process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. of ammonia and 20.00 g of oxygen?

Q.

Structure of disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.

(a) 'a' carbon of glucose and 'a' carbon of fructose
(b) 'a' carbon of glucose and 'e' carbon of fructose
(c) 'a' carbon of glucose and 'b' carbon of fructose
(d) 'f'' carbon of glucose and 'f'' carbon of fructose

Q.

How do you explain the presence of all the six carbon atoms in glucose in a stright chain?

Q.

How do you explain the presence of five -OH groups in glucose molecule?

Q.

Write the reactions of D-glucose which can't be explained by its open chain structure. How can cyclic structure of glucose explain these reactions?

Q.

What are the observations against an open-chain structure for the glucose molecule?

Q.

How do you explain the presence of an aldehydic group in a glucose molecule?

Q.

Glucose is an example of-

Q.

Is Fructose a aldohexose?

Q. Calculate the molarity of 2.5gm of ethanoic acid CH3COOH in 73 gm of benzene

Q.

How will you distinguish $1^{\circ }and{2}^{\circ }$ hydroxyl groups present in glucose? Explain with reactions.

Q. Fructose is an example of:

1. Aldopentose
2. Ketopentose
3. Ketohexose
4. Aldoexose

Q.

Glucose reacts with acetic anhydride to form:

1. tetraacetate

2. penta-acetate

3. monoacetate

4. hexa-acetate

Q.

Which one is the absolutely specific term?

1. A diastereomer

2. An epimer

3. An anomer

4. None of the three

Q. When the $-OH$ group at anomeric carbon lies on the same side as that of the $-OH$ group on $C_3$ carbon, it is known as______

1. $\beta$-D-glucose
2. $\beta$-L-glucose
3. $\alpha$-D-glucose
4. $\alpha$-L-glucose

Q.

Which of the following statement is true ?

1. Both of the above statements are true

2. Neither of the two statement is true

3. Anomers are also epimers

4. Epimers are also anomers

Q.

On the basis of which evidence D-glucose was assigned the following structure?

$\underset{C{H}_{2}OH}{\underset{|}{\underset{(CHOH{)}_4}{\underset{|}{CHO}}}}$

Q.

Is a respirometer used to measure the rate of respiration?

Q.

Three structures are given below in which two glucose units are linked.
Which of these linkages between glucose units are between $C_{1}and{C}_4$ and which linkages are between $C_{1}and{C}_6?$


(a) (i) is between C1 and C4, (ii) and (iii) are between C1 and C6
(b) (i) and (ii) are between C1 and C4, (iii) is between C1 and C6
(c) (i) and (iii) are between C1 and C4 (ii) is between C1 and C6
(d) (i) and (iii) are between C1 and C6, (ii) is between $C_{1}and{C}_4$

Q.

Compounds I and II may be grouped as

1. Diastereomers

2. Epimers

3. All of the three

4. C - 2 epimers

Q. When D-fructose is reduced with $NaB{H}_4/H_3{O}^{+}$, alditols are produced. Which of the following compounds will give the same alditol on reduction with $NaB{H}_4/H_3{O}^{+}$?

1. 
2. 
3. 
4. 

Q. The structure of D-(+)-glucose is

The structure of L-(-)-glucose is

(IIT-JEE-2015, Advanced)

1. 
2. 
3. 
4. 

Q.

Hawroth structure of β - D (+) glucose is?

1. 
2. 
3. 
4. 

Q. Identify the pair of diastereoisomers.

1. 
2. 
3. 
4. 

Q. $\alpha -D-$ glucose and $\beta -D-$ glucose differ from each other due to difference in one of the carbons with respect to its

1. Size of hemiacetal ring
2. Configuration
3. Number of -OH groups
4. Conformation

Q. Explain the mutarotation of glucose.