Sucrose MCQs
Sucrose (C₁₂H₂₂O₁₁) is a disaccharide composed of glucose and fructose. It is formed when the C1 carbon of α-D-glucose and the C2 carbon of β-D-fructose are linked by a glycosidic bond. As a non-reducing sugar, sucrose has both its aldehyde and ketone groups bonded, preventing them from acting as reducing agents. Commonly known as table sugar, sucrose is extracted and refined from sugarcane. Although sucrose is dextrorotatory, hydrolysis of sucrose produces a mixture that is levorotatory due to the higher levorotation of fructose, resulting in a substance known as invert sugar.
Invert sugar is produced on hydrolysis of
(a) fructose
(b) dextrose
(c) sucrose
(d) glucose
The general formula of carbohydrates is
(a) Cx(H2O)y
(b) Cx(H2)yO
(c) Cx(H2O)y + 2
(d) Cx – 1(H2O)y
Which of the following is a non-reducing sugar?
(a) Sucrose
(b) Maltose
(c) Lactose
(d) Glucose
The phenomenon of mutarotation is not exhibited by
(a) (–) Fructose
(b) (+) Lactose
(c) (+) Maltose
(d) (+) Sucrose
This is not a disaccharide
(a) maltose
(b) galactose
(c) sucrose
(d) lactose
Sucrose on hydrolysis yields
(a) two glucose molecules
(b) glucose and fructose
(c) glucose and lactose
(d) glucose and galactose
The sweetest sugar is
(a) sucrose
(b) fructose
(c) maltose
(d) glucose
Sucrose is a non-reducing sugar due to
(a) presence of α-hydroxy keto group
(b) its conversion to invert sugar
(c) the linkage between both the anomeric carbon atoms
(d) equal amount of D(+) glucose and D(–) fructose
Which of the following sugars does not give positive Seliwanoff’s test?
(a) Inulin
(b) Sucrose
(c) Fructose
(d) Maltose
Which of the following is used as table sugar?
(a) Disaccharide of D-glucose
(b) D-glucose
(c) Monosaccharide
(d) Disaccharide of D-glucose and D-fructose
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