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Carbohydrates MCQ basic level

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th..

Q1. Glucose when heated with in presence of dry HCl gas gives α and β-methyl glucosides because it contains:

•  An aldehyde group
•  A-CH2OH group
•  A ring structure
•  Five hydroxyl groups

Solution
Five hydroxyl groups

Q2. Hydrolysis of sucrose is called:

•  Esterification
•  Saponification
•  Inversion
•  Hydration

Solution
Saponification

Q3.   Sugar can be tested in urine by:

•   Molish test
•  Dunstan's test
•  Benedict's test
•  Legal's test

Solution
Legal's test

Q4. Malt sugar on hydrolysis yields:

•  Glucose and maltose
•  Glucose and fructose
•  Glucose and lactose
•  Glucose only

Solution
Glucose only

Q5. Which of the following statements about ribose is incorrect ?

•  It is a polyhydroxy compound
•  It is an aldehyde sugar
•  It has six carbon atoms
•  It exhibits optical activity

Solution
It is a polyhydroxy compound 

Q6. On complete hydrolysis of starch, we finally get:

•  Glucose
•  Fructose
• Glucose and fructose
•  Sucrose

Solution
Fructose

Q7. Maltose contains how many oxygen atoms:

•  6
•  10
•  11
•  22

Solution
11

Q8. The correct name of ‘sucrose' is:

•  α-D-glucopyranosyl-β-D-fructofuranoside
•  Tβ-D-glucopyranosyl-β-D-fructofuranoside
•  α-D-glucopyranosyl-α-D-fructofuranoside
•  β-D-glucopyranosyl-α-L-fructofuranoside

Solution
β-D-glucopyranosyl-β-D-fructofuranoside

Q9.Sucrose is:

•  Laevorotatory
•  Dextrorotatory
•  Racemic mixture
•  Optically inactive

Solution
Optically inactive

Q10. The hydrolysis of sucrose produces a mixture which is:

•  Laevorotatory
•  Dextrorotatory
•  Equally both (+) and (–) rotatory
• Optically inactive

Solution
Dextrorotatory