Chemical Properties of Glucose

Q. Which one of the following compounds will give racemic mixture in $S_{N}1$ reaction?

1. 
2. 
3. 
4. 
5. None of the above

Q. An $S_{N}2$ reaction at an asymmetric carbon of a compound always gives

1. an enantiomer of the substrate
2. a product with opposite optical rotation
3. a mixture of diastereomers
4. a single stereoisomer

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

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

Q.

QUESTION 14.10

Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.

Q.

On complete reaction of ${\mathrm{FeCl}}_3$ with oxalic acid in an aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is …………..(Round off to the Nearest Integer)

Q. Statement I: Glucose gives a reddish-brown precipitate with Fehling's solution.
Statement I: Reaction of glucose with Fehling's solution gives CuO and gluconic acid.
(IIT-JEE, 2007)

1. Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I.
2. Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I.
3. Statement I is true; Statement II is false
4. Statement I is false; Statement II is true

Q.

Which of the following pairs can be distinguished by Fehling's solution ?

1. Glucose and sucrose

2. Methanal and ethanal

3. Glucose and fructose

4. Hydroxypropanone and benzaldehyde

Q. Alcoholic KOH will favour SN2 or Elimination reaction

Q.

What observations suggest a cyclic structure for the glucose molecule?

Q.

Which of the following reactions of glucose can be explained only by its cyclic structure?
(a) Glucose forms pentaacetate
(b) Blucose reacts with hydoxylamine to form an oxime
(c) Pentaacetate of glucose does not reach with hydroxyl amine
(d) Glucose is oxidised by nitric acid to gluconic acid

Q.

(+) Glucose and (-) fructose can be differentiated by ?

1. Benedict solution

2. Bromine water

3. Tollens reagent

4. None of these

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.

Give trihydroxy propane as an example of a simple lipid.

Q. Which one of the following compound will give (d) and (l) form in $S_{N}1$ reaction (as major product)?

1. 
2. 
3. 
4. $C{H}_{3}Cl$

Q. The total number of reducing sugars among the following is:

Q. Glucose gives silver mirror with Tollen's reagent. It shows the presence of

1. An acidic group
2. An alcoholic group
3. A ketonic group
4. An aldehydic group

Q.

QUESTION 14.99(i)

What happens when D-glucose is treated with the following reagents?

(i) HI

(ii) Bromine water

(iii) $HN{O}_3$

Q.

Match the following enzymes given in Column I with the reactions they catalyse given in Column II. $\begin{array}{cc}ColumnI& ColumnII\\ \left(Enzymes\right)& \left(Reactions\right)\\ A.Invertase& 1.DecompositionofureaintoN{H}_{3}andC{O}_2.\\ B.Maltase& 2.Conversionofglucoseintoethylalcohol.\\ C.Pepsin& 3.Hydrolysisofmaltoseintoglucose.\\ D.Urease& 4.Hydrolysisofcanesugar.\\ E.Zymase& 5.Hydrolysisofproteinsintopeptides.\end{array}$

Q.

Which of the following evolves carbon dioxide on oxidation with periodate?

1. None

2. Both

3. 

4. 

Q. A 3-chlorocyclohexene is treated with $C{l}_2/CC{l}_4$. The number of stereoisomers formed is

1. 2
2. 3
3. 4
4. 1

Q. Observe the following reaction and find out that how many number of reactant stereoisomers can be reduced to optically inactive meso product.

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

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. Glucose, sucrose
2. Glucose, fructose
3. Hexanal, Acetophenone
4. Fructose, sucrose

Q.

Preparation of glycine by Strecker synthesis involves as one of the starting compounds ?

1. Methanol

2. Formaldehyde

3. Acetaldehyde

4. Either (a) or (c)

Q. specific rotation of an optically pure compound (X) is +40. in a reaction the compound (X) is obtained through a series of chemical reactions . if the specific rotation of the solution is -20, what would be the percentage of laevorotatory isomer in solutio

Q. What is reaction of an aldehyde with peroxide acid(like PhCO3H). Will it be same like Baeyer villiger oxidation?

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

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