Solved question paper for Chem Dec-2023 (B-TECH 1st-2nd)

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Chemistry Dec-2023

PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2023

Chemistry previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program, 1st-2nd semester. This section makes it easier to browse subject-wise old question papers for Chemistry, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for chemistry syllabus while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.

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SECTION -B & C. have FOUR questions each.

Short Answer Dec-2023 • PTU B-TECH

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May 2025 SECTION -B &C. have FOUR questions each.

Dec 2024 SECTION -B&C have FOUR questions each.

Dec 2024 SECTION-Bac have FOUR questions each, ;

May 2023 SECTION - B & C have FOUR questions each, carrying EIGHT mark s each.

Dec 2023 SECTION -B & C have FOUR questions each.

Dec 2020 SECTION -B &C. have FOUR questions each.
Select atleast TWO questions from SECTION -B &C. is NPD ( Cantret e cation FA Library / 2 ij

Short Answer Dec-2023 • PTU B-TECH

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= Answer briefly : ks FR a =. . DCs Aor’

Short Answer Dec-2023 • PTU B-TECH

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The following compounds show only one signal in 'H NMR. Write their structurale—— formula, (a) CsH)2, (>), C2ti,O.

Short Answer Dec-2023 • PTU B-TECH

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Why d and forbital Show poor shielding effect?

Short Answer Dec-2023 • PTU B-TECH

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May 2023 Why d and f orbitals show poor shielding effect?
What isthe essential condition of molecule to NMReactive?

Short Answer Dec-2023 • PTU B-TECH

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Whatis the shape of BF; molecule?

Short Answer Dec-2023 • PTU B-TECH

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What do you understand by effective nuclear charge? {) How does Vander Waals*interaetion occur? *

Short Answer Dec-2023 • PTU B-TECH

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What are rocking and wagging vibrations?

Short Answer Dec-2023 • PTU B-TECH

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What is optical activity? -

Short Answer Dec-2023 • PTU B-TECH

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Define entropy.

Short Answer Dec-2023 • PTU B-TECH

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Dec 2024 What is Entropy?

Dec 2024 What is Entropy?
Give one example of Hard and soft acid each. 1|

Short Answer Dec-2023 • PTU B-TECH

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May 2025 Give one example of hard and soft acid.

Dec 2020 Give one example of Hard and soft acid each.

What will happen if the walls of the one dimensional box are suddenly removed?

Short Answer Dec-2023 • PTU B-TECH

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Draw the molecular diagram of O2, O,” and Or. Compare these on the basis of their bond order and magnetic behavior. Also, calculate its bond length and bond dissociation energy.

Short Answer Dec-2023 • PTU B-TECH

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Discuss the principle of electron spectroscopy. Explain with reference to CH2=CHo, | .3-butadiene and carbonyl compound.

Short Answer Dec-2023 • PTU B-TECH

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Describe the working principle and selection rule for NMR.

Short Answer Dec-2023 • PTU B-TECH

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May 2025 In 1H NMR spectroscopy, what is meant by chemical shift?

May 2025 b) What is the principle of NMR spectroscopy? Explain.

May 2023 Explain the theory of NMR spectroscopy. (6)

Dec 2023 b) Explain chemical shift in NMR.

Explain the following terms with example :

Short Answer Dec-2023 • PTU B-TECH

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May 2025 Explain the following terms :

Dec 2023 Define the following terms:

Dec 2023 Explain the following :

Dec 2020 Explain the following terms :
lonic interaction

Short Answer Dec-2023 • PTU B-TECH

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Dipole interaction

Short Answer Dec-2023 • PTU B-TECH

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Vander Waals interaction.

Short Answer Dec-2023 • PTU B-TECH

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Derive Nernst Equation and give its application.

Short Answer Dec-2023 • PTU B-TECH

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May 2025 b) State the Nernst equation and explain its application in calculating cell potentials.

Dec 2023 a) Derive Nernst Equation for the calculation of cell E.M.F.

Dec 2023 a) Derive Nernst equation for calculation of cell e.m.f.
Simultaneous oxidation and reduction, according to the reaction . 2 Cu’ (aq) > Cu*’ (aq) +Cu(s) Calculate E° for the reaction? (E° Cu .Cu 0.34 V and E° Cur’ | Cu’ = 0.15 V)

Short Answer Dec-2023 • PTU B-TECH

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Give reason for the following :

Short Answer Dec-2023 • PTU B-TECH

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Dec 2023 Explain why:
Second ionisation energy of an atom is always greater than the first ionisation energy of an atom.

Short Answer Dec-2023 • PTU B-TECH

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Electron affinities of halogen are highest. ;

Short Answer Dec-2023 • PTU B-TECH

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The size of anion is larger than its parent atom.

Short Answer Dec-2023 • PTU B-TECH

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Why Na is smaller than Na? 2 | exams Dre ere rato ry

Short Answer Dec-2023 • PTU B-TECH

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a)“ Define chirality. What are chiral molecules?

Short Answer Dec-2023 • PTU B-TECH

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May 2025 What is the difference between enantiomers and diastereomers?

May 2025 What is enantiomerism? Explain the requirement for enantiomerism.

Dec 2024 b) What is chirality and explain why certain molecules are chiral?

Dec 2024 What is optical activity and how can it be used to distinguish between enantiomers?

Dec 2024 What are the differences between diastereoisomer and enantiomer?

Dec 2024 What are the differences between diastereoisomer and enantiomer?

Dec 2024 What is optical activity and how it can be used to distinguish between enantiomers?

Dec 2024 What is chirality and explain why certain molecules are Chiral?

Dec 2023 Whatis diastereomerism? Explain by giving at Icast two examples.

Differentiate between the following :

Short Answer Dec-2023 • PTU B-TECH

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Structural isomers and Stereoisomer

Short Answer Dec-2023 • PTU B-TECH

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Enantiomers and Diastercomers it) Configuration and Conformation

Short Answer Dec-2023 • PTU B-TECH

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Explain the synthesis of any one commonly used drug molecule.

Short Answer Dec-2023 • PTU B-TECH

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Dec 2020 Discuss the synthesis of acommonly used drug molecule by taking a suitable example.

Explain the mechanism of SN, reaction. NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student. 3 |

Short Answer Dec-2023 • PTU B-TECH

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01 Where can I find Chemistry previous year question papers for Bachelor of Technology, 1st-2nd semester?

This page lists Chemistry question papers uploaded for Punjab Technical University Bachelor of Technology, 1st-2nd semester, organized for subject-wise browsing where available.

02 Are these official Punjab Technical University question papers?

BRpaper is not the official website of Punjab Technical University. These papers are shared for reference and revision purposes only and are not official university material.

03 How can previous year Chemistry papers help in exam preparation?

Reviewing past papers can help you understand how questions are typically framed, notice commonly repeated topics, and get a sense of the exam pattern before your own exam.

04 What kind of topics does Chemistry usually cover?

The question papers here relate to the official Chemistry syllabus set by the university for this course and semester.

05 Does this page include a Chemistry syllabus or solved answers?

This page focuses on providing access to the previous year question papers themselves. A separate question bank or solved answers may not be available for every paper.

06 Can I find papers for other subjects in the same Bachelor of Technology?

Yes, BRpaper organizes papers by university, course, stream, and semester, so you can browse other subjects within the same Punjab Technical University Bachelor of Technology.

Solved question paper for Chem Dec-2023 (B-TECH 1st-2nd)

Chemistry Dec-2023

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