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Biomolecules
- Online Test
Biomolecules
TEST : 1
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q1.
Carbohydrates Which taste sweet are called
A.
aldehydes and ketones
B.
Sugars
C.
Saccharides
D.
Saccharides and sugars.
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Answer :
Option D
Explaination / Solution:
carbohydrates like monosaccharides (one sugar molecule, example: Glucose) and disaccharides (two sugar molecule,example Sucrose I.e Table sugar) always tastes sweet.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q2.
The following molecule is called as
A.
Vitamin
B.
carbohydrate
C.
Protein
D.
Lipid
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Answer :
Option B
Explaination / Solution:
It is aldohexose. An aldohexose is a hexose with an aldehyde group on one end.it is naturally occurring in nature and is found in fruits.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q3.
The following compound can be called as
A.
D ( – ) – glucose
B.
D(+) – glucose
C.
L ( – ) – glucose
D.
L(+) – glucose
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Answer :
Option B
Explaination / Solution:
It is dextrotatory , as second last hydroxy group is in right position.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q4.
The spatial arrangement of the molecule is denoted by
A.
D or L sign before the molecule
B.
D+
C.
+ or – sign before the molecule
D.
L –
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Answer :
Option A
Explaination / Solution:
D is dextrotatry , L is leavorotatry.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q5.
Choose the appropriate answer(s) for the below representation from the options given
A.
Enantiomers
B.
dextro and levo rotatory molecules
C.
stereo isomers
D.
All of these
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Answer :
Option D
Explaination / Solution:
They are, enatiomers as 1 is R, other is S. Therefore are stereo isomers. And dextro and levo.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q6.
The number of asymmetric carbon atom(s) in below figure is are
A.
1
B.
3
C.
1 and 3 carbon atoms
D.
2
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Answer :
Option A
Explaination / Solution:
Only 1 asymmetric center.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q7.
The most abundant organic compound on earth
A.
Glucose
B.
Starch
C.
None of these
D.
Cellulose
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Answer :
Option A
Explaination / Solution:
Glucose is most abundant organic compound on earth.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q8.
The polymer(s) of dextrose is
A.
Glucose
B.
Starch
C.
Cellulose and Starch,
D.
Cellulose
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Answer :
Option C
Explaination / Solution:
Cellulose and Stach is polymer of dextrose.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q9.
Oxime is formed by treating glucose with
A.
nitric acid,
B.
bromine water
C.
hydroxylamine
D.
Water
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Answer :
Option C
Explaination / Solution:
Oxime is combination of carbonyl group and and hydroxyl groups.
# Biomolecules
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q10.
Acetylation of glucose yields
A.
None of these
B.
N Methylbenzamide
C.
p – toluenesulphonyl chloride
D.
glucose pentaacetate
View Solution
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Answer :
Option D
Explaination / Solution:
Acetyl group adds in glucose, giving acetylation reaction.
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