Download PTU B.Sc-BT 2020 March 1st Sem 47022 Inorganic Chemistry Question Paper

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B.Sc.(BT) (2014 to 2017) (Sem.-1)
INORGANIC CHEMISTRY
Subject Code : BSBT-103
M.Code : 47022

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks 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.

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SECTION-A

1) Answer briefly :

1. Which element has higher atomic volume Na or K and Why?
2. Explain why electron affinities of Halogens are the highest?
3. Why do noble gases exist as monoatomic?

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4. Discuss the geometry of SF₄ molecule on the basis of VSEPR theory.
5. Explain the difference in bond angles of NH₃ and NF₃.
6. Define optical isomerism with a suitable example.
7. Discuss the differences between inter and intramolecular hydrogen bonding with examples.
8. Define paramagnetism and anti-ferromagnetism.

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9. Discuss the important postulates of VBT.
10. What is the importance of Fajan’s rules in bonding?

SECTION-B

What do you understand by the terms resonance and resonance energy? What are the essential conditions for writing resonating structures?

Using VSEPR theory, explain the structures of SF₄, ClF₃ and H₂O in details.

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With the help of MOT explain why bond length of CO⁺ is larger than that of CO?

Discuss the basic postulates of Werner’s co-ordination theory with suitable examples.

Discuss the limitations of VBT and postulates of MOT in covalent bonding.

SECTION-C

1. (a) Define electronegativity and discuss Pauling’s scale of electronegativity.
   

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   (b) Define ionisation, hydrate and linkage isomerism in co-ordination compounds with suitable examples of each of them.
2. (a) Discuss sp³d² and sp³d³ hybridizations in details with examples.
   (b) Discuss postulates of CFT in details. (What are labile and inert complexes?
3. (a) Compare the stability of N₂ and O₂ molecules on the basis of MOT.
   (b) What are isoelectronic-species? Give an example of the molecule isoelectronic with CO.

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NOTE : Disclosure of identity by writing mobile number or making passing request on any page of Answer sheet will lead to UMC against the Student.

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