Maltose

Q. What are the functional groups present in the structure of maltose ?

(JEE MAIN 2020)

1. One ketal and one hemiketal
2. One acetal and one hemicetal
3. Two acetals
4. One acetal and one ketal

Q. Match the following sugars with the linkage present in it

1. $C_1\mathrm{of}\mathrm{glucose},C_4\mathrm{of}\mathrm{galactose}$
2. $C_1\mathrm{of}\alpha -\mathrm{glucose},C_2-\beta \mathrm{fructose}$
   
3. $C_1-C_4\mathrm{linkage}\mathrm{of}\alpha -D\mathrm{glucose}\mathrm{units}$

Q. Maltose on treatment with dilute $HCl$ gives:

1. D–Galactose
2. D–Glucose and D–Fructose
3. D–Fructose
4. D–Glucose

Q. The correct statement about the following disaccharide is:

1. Ring (a) is pyranose with $\alpha$ - glycosidic link
2. Ring (a) is furanose with $\alpha$ - glycosidic link
3. Ring (b) is furanose with $\alpha$ - glycosidic link
4. Ring (b) is pyranose with $\beta$ - glycosidic link

Q.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are correct statements and reason explains the assertion.
(b) Both assertion and reason are wrong statements.
(c) Assertion is correct statement and reason is wrong statement.
(d) Assertion is wrong statement and reason is correct statement.
(e) Assertion and reason both are correct statements but reason does not explain assertion.
Assertion (A) $\beta -$glycosidic linkage is present in maltose.
Reason (R) Maltose is composed of two glucose units in which C-1 of one glucose unit is linked to C-4 of another glucose unit.

Q. Maltose on treatment with dilute HCl gives:

1. D-Glucose and D-Fructose
2. D-Fructose
3. D-Glucose
4. D-Galactose

Q. Study the structure of maltose and mark the incorrect statement.

1. Maltose is composed of two $\alpha -D-$ glucose units
2. $C-1$ of one glucose is linked to $C-4$ of other unit
3. It is a non-reducing sugar
4. It is a disaccharide

Q. Which glycosidic linkage is present in Maltose?

1. $\alpha -D-(+)-glucose\left(C_1\right)-O-\left(C_2\right)-\beta -D-(-)-glucose$
2. $\alpha -D-(+)-glucose\left(C_1\right)-O-\left(C_4\right)-D-(+)-glucose$
3. $\beta -D-(+)-glucose\left(C_1\right)-O-\left(C_4\right)-D-(-)-glucose$
4. $\beta -D-(+)-glucose\left(C_1\right)-O-\left(C_4\right)-D-(+)-glucose$

Q. Which of the following enzymes is required for the conversion of starch to maltose?

1. Diastase
2. Zymase
3. Maltase
4. Invertase

Q. An organic compound answers Molisch's test as well as Benedict's test. But it does not answer Scliwanoff's test. Most probably, it is :

1. Sucrose
2. Protein
3. Fructose
4. Maltose