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PPSC Lecturer Chemistry Test 6 Online Preparation MCQs

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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.

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There will be 25 multiple choice question in the test.
Answer of the questions will change randomly each time you start this test.
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Test Instructions:-
Test Name	Lecturer Chemistry
Subject	Chemistry Test 6
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 Practice Test 6

1 / 25

The order of stability of carbonium ions is:

tertiary > secondary > primary

primary > tertiary > secondary

secondary > tertiary > primary

primary > secondary > tertiary

2 / 25

Homolytic fission of covalent bond between carbon atoms will produce:

Free radicals

Two molecules

Two carbonium ions

Carbonium ion and carbanion

3 / 25

What is the bond length of a carbon-carbon double bond?

1.20 Å

1.54 Å

1.68 Å

1.34 Å

4 / 25

Which of the following compounds have planar molecules?

1,3-butadiene

ethyl alcohol

(b) and (d)

formaldehyde

diethyl ether

5 / 25

Which of the following is the correct order of bond lengths:

C≡C > C–C > C=C

C≡C < C–C > C=C

C–C < C=C < C≡C

C–C > C≡C > C=C

6 / 25

Which of the following compounds have lowest dipole moment?

carbon tetrachloride

chloroform

chloromethane

dichloromethane

7 / 25

What is bond angle between the hybrid orbitals in methane?

109.5°

120°

115.5°

180°

8 / 25

Which statement is true?

Resonance hybrids are averages of all resonance forms resembling the less stable forms

Resonance hybrids are inherently unstable.

Resonance hybrids are more stable than any individual resonance form

Resonance hybrids are averages of all resonance forms resembling the more stable forms

9 / 25

Homolytic fission of C–C bond leads to the formation of :

Carbanions

Free radicals

None of these

Carbonium ions

10 / 25

Which of the following is a planar molecule?

Formic acid

Acetic acid

Acetone

Formaldehyde

11 / 25

The order of stability of carbanions isl

primary > secondary > tertiary

tertiary > secondary > primary

tertiary > primary > secondary

secondary > tertiary > primary

12 / 25

Resonance structures of a molecule have:

same number of paired electrons

same arrangement of atoms

different number of paired electrons

different arrangement of atoms

(a) and (c)

13 / 25

The carbon-carbon bond length is maximum in:

HC≡CH

CH2=CH2

CH3CH3

14 / 25

The carbon-carbon bond lengths in rank of increasing bond length is :

triple, single, double

triple, double, single

single, triple, double

single, double, triple

15 / 25

The H–C–C bond angle in ethane is:

60°

118°28′

109.5°

120°

16 / 25

Compound in which carbons use only sp3 hybrid orbitals for bond formation is
(a) CH3CH2CH3
(b) CH3C≡CH
(c) CH3CH=CH2
(d) CH2=CH—CH=CH2

17 / 25

The H–C–H bond angle in ethylene is:

60°

180°

90°

120°

18 / 25

Which molecule has a nonzero dipole moment?

CO2

Cl2

CCl4

CHCl3

19 / 25

Which of the following hydrocarbons has the shortest C–C bond length?

CH2=CH2

HC≡CH

CH3CH3

20 / 25

Which alkyl free radical is the most stable?

tertiary

methyl

secondary

primary

21 / 25

How many atoms are attached to an atom having a sp hybridization?

22 / 25

When the carbon atom is sp2 hybridized in a compound, it is bonded to:

4 other atoms

5 other atoms

3 other atoms

2 other atoms

23 / 25

Turbulent flow of a fluid occurs when the Reynold number is a above about:

Turbulent flow of a fluid occurs when the Reynold number is a above about

24 / 25

Which molecule has the greatest dipole moment
(a) CH₃Cl
(b) CH₃Br
(c) CH₃F
(d) CH₃I

25 / 25

Which of the following compounds have highest dipole moment?

dichloromethane

chloroform

chloromethane

carbon tetrachloride

Your score is

The average score is 74%

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