PPSC Lecturer Chemistry Test 37 Online Preparation MCQs

1 Comment / By Hassan / May 23, 2021

Given below on this Website Online Free Taleem is free online MCQ’s test related to PPSC of Lecturer Chemistry. All the individuals who are going to appear in PPSC Lecturer of Chemistry written test can attempt these tests in order to prepare for it in best possible way. Our tests include all the important questions MCQs of Lecturer of PPSC Chemistry, all Past Papers of Lecturer of Chemistry PPSC that have extremely high amount of chances for been included in the actual exam which make our test undoubtedly the best source of preparation.

Note:-

There will be 25 multiple choice question in the test.
Answer of the questions will change randomly each time you start this test.
Practice this test at least 5 times if you want to secure High Marks.
At the End of the Test you can see your Test score and Rating.
If you found any incorrect answer in Quiz. Simply click on the quiz title and comment below on that MCQ. So that I can update the incorrect answer on time.

Please Click Below START Button to Take this Lecturer Chemistry Test Online.

Test Instructions:-
Test Name	Lecturer Chemistry
Subject	Chemistry Test 37
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

PPSC LECTURER OF CHEMISTRY TEST NO. 37

1 / 25

Which of the following is not a monosaccharide?

Ribose

Sucrose

Fructose

Glucose

2 / 25

A carbohydrate composed of three to ten sugar molecules is called a(n) :

oligosaccharide

disaccharide

polysaccharide

monosaccharide

3 / 25

Uriedes are

None of these

Acetyl derivatives of urea

Alkyl derivatives of urea

Halogen derivatives of urea

4 / 25

The principal sugar in blood is

Fructose

Galactose

Glucose

Sucrose

5 / 25

How many stereoisomers are possible for a 2-ketohexose?

6 / 25

Which is a disaccharide?

Fructose

Cellulose

Glucose

Maltose

7 / 25

The most stable conformation of cyclohexane is the :

Chair form

Boat form

Haworth form

8 / 25

Which of the following would give a positive Tollen’s test?

α-D-glucopyranose

methyl β-D-glucopyranoside

sucrose

methyl α-D-ribofuranoside

9 / 25

All chiral D-sugars rotate plane-polarized light :

counterclockwise

clockwise

+20.0°

in a direction that cannot be predicted but must be determined experimentally

10 / 25

What percentage of cyclohexane molecule is estimated to be in the boat form at any given time?

between 90% and 99%

approximately 50%

over 99%

less than 1%

11 / 25

Which of the following statements best describes the meaning of a “glycoside”?

It is the hemiacetal of a sugar.

It is the mirror image of a sugar.

It is the acetal of a sugar.

It is the enantiomer of a sugar.

12 / 25

An aqueous solution of glucose behaves as an aldehyde because:

it is hydrolyzed by water to the free aldehyde

it is a ketone, but is in equilibrium with the aldehyde form

glucose is actually a cyclic aldehyde

its cyclic hemiacetal, the predominant form, is in equilibrium with the free aldehyde form

13 / 25

How many chirality centers are there in a 2-ketohexose?

14 / 25

Diethyl malonate reacts with urea in the presence of sodium ethoxide to form

Barbital

Uric acid

Barbituric acid

Phenobarbital

15 / 25

Uric acid on oxidation with alkaline KMnO4 forms :

Barbituric acid

Caffeine

Allantoin

Urea

16 / 25

Monosaccharides are classified according to :

whether they contain an aldehyde or a ketone group.

all of the above.

their configurational relationship to glyceraldehyde.

the number of carbon atoms in the molecule.

17 / 25

Which of the following statements best describes the meaning of “mutarotation”?

a slow exchange between hydrogen and deuterated hydrogen

a rapid exchange between the D and L forms

a slow change in optical rotation to reach an equilibrium value

a rapid exchange between the α and β forms of diastereomeric sugars

18 / 25

Which term describes a sugar where one of the OH groups has been replaced with a hydrogen?

amino sugar

deoxy sugar

imino sugar

dehydroxy sugar

19 / 25

The bond angle between carbon atoms in cyclohexane is

120°

109.5°

90°

60°

20 / 25

Which is a monosaccharide?

Cellulose

Sucrose

Maltose

Galactose

21 / 25

The designation D or L before the name of a monosaccharide

indicates the position of the OH group on the carbon next to the primary alcohol group.

indicates the direction of rotation of polarized light.

indicates the length of the carbon chain in the carbohydrate.

indicates the position of the asymmetric carbon atoms in the carbohydrate.

22 / 25

Anomers of D-glucopyranose differ in their stereochemistry at

23 / 25

Which of the following is true about sucrose?

It is a monosaccharide.

It hydrolyzes to fructose and glucose.

It undergoes mutarotation in water.

It is a reducing sugar.

24 / 25

In solution, glucose exists as:

the open-chain form only

the cyclic acetal form only

an equilibrium mixture of the open-chain form and cyclic hemiacetal forms

the cyclic hemiacetal form only

25 / 25

Which of the following statements best describes the difference between amylose and amylopectin?

Amylose is a straight-chain polysaccharide while amylopectin is a branched polysaccharide.

Amylose contains α-1,6-glycosidic linkage which amylopectin does not contain.

Amylose is a branched polysaccharide while amylopectin is a chain polysaccharide.

Amylose is composed of thousands of D-glucose units while amylopectin is composed of thousands of D-galactose units.

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1 thought on “PPSC Lecturer Chemistry Test 37 Online Preparation MCQs”

Abaid ullah
May 23, 2021 at 3:47 pm

Excellent

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