Carbohydrates (Classification; Aldoses and Ketoses...) NEET Questions

Organic Chemistry - Biomolecules

Carbohydrates (Classification; Aldoses and Ketoses...) MCQ Questions


13.
Fructose belongs to which class of monosaccharides?
A.
Aldopentose
B.
Aldohexose
C.
Ketopentose
D.
Ketohexose
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ANSWER :
D. Ketohexose
14.
Ribose, a pentose sugar present in nucleic acids, is classified as:
A.
Aldohexose
B.
Aldopentose
C.
Ketopentose
D.
Ketotetrose
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ANSWER :
B. Aldopentose
15.
A ketohexose contains:
A.
5 carbon atoms and a ketone group
B.
6 carbon atoms and an aldehyde group
C.
5 carbon atoms and an aldehyde group
D.
6 carbon atoms and a ketone group
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ANSWER :
D. 6 carbon atoms and a ketone group
16.
Glucose is also commonly known as:
A.
Maltose
B.
Lactose
C.
Dextrose
D.
Levulose
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ANSWER :
C. Dextrose
17.
Commercial glucose is prepared by hydrolysis of starch with:
A.
Dilute H2SO4 at 393 K under 2-3 atm pressure
B.
Concentrated H2SO4 at 273 K
C.
Dilute NaOH at 373 K
D.
Concentrated HCl at room temperature
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ANSWER :
A. Dilute H2SO4 at 393 K under 2-3 atm pressure
18.
When sucrose is boiled with dilute HCl or H2SO4 in alcoholic solution, the products formed are:
A.
Only glucose
B.
Equal amounts of glucose and fructose
C.
Glucose and galactose
D.
Only fructose
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ANSWER :
B. Equal amounts of glucose and fructose