Download PTU B.Sc (Non-Medical) 2020 March 1st Sem 75743 Inorganic Chemistry Question Paper

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Roll No. Total No. of Pages : 02
Total No. of Questions : 09

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B.Sc. (Non Medical) (2018 & Onwards) (Sem.-1)
INORGANIC CHEMISTRY
Subject Code : BSNM-102-18
M.Code : 75743
Time : 3 Hrs. Max. Marks : 50

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying ONE mark each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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1. Define the following :
   1. Why are half filled orbitals more stable?
   2. What are the maximum number of hydrogen bonds that a molecule of water can have?
   3. Out of LiCl and LiF which has more covalent character and why?
   4. Give the shape and geometry of XeF₄.
   5. What is the packing efficiency of NaCl?

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   6. How do we assign angular quantum number if n=4?
   7. Give the trend of ionisation enthalpy as we go down the group.
   8. Define ion-dipole forces.
   9. Discuss the shielding effect while going down in a group in a periodic table.
   10. What is the hybridisation of PCl₅?

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SECTION-B

2. Differentiate between the following :
   1. Normalised and Orthogonal wave function
   2. Valence band theory and VSEPR theory

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3. 1. Define Heisenberg uncertainty principle with its mathematical expression.
   2. A cricket ball weighing 100gm is to be located within 0.1Å. What is the uncertainty and its velocity. (h = 6.626 x 10^-34 JS).
4. Differentiate between the following :
   1. Frenkel defect and Schottky defect
   2. Dipole-dipole and induced dipole interaction

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5. Calculate the effective nuclear charge of following using Slater’s rule :
   1. 4s^e in potassium atom
   2. Last electron with configuration 1s²2s^*2p⁶3s²3p⁵
   3. One of the 3d electron of Vanadium (Atomic No.-23)

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6. 1. Explain Born Haber cycle and give its applications.
   2. Explain semiconductors, conductors and insulators on the basis of band theory with diagram.

SECTION-C

7. Draw the molecular diagram of O₂, O₂⁺ and O₂^-. Compare them on the basis of its bond order and magnetic behaviour. Also calculate its bond length and bond dissociation energy . (10)

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8. 1. Determine the following for the FCC structure : (6)
      1. Packing efficiency
      2. Radius ratio
      3. Relation between radius and length
   2. Derive the Born-Lande equation. (4)

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9. 1. Illustrate the Schrodinger wave equation in one dimensional box. (6)
   2. Give brief description of following : (4)
      1. Hund’s Rule
      2. Pauli’s Exclusion principle
      3. Aufbau principle

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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.

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