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D 53645 (Pages : 2) ಸ ರ ರರ ௧௨2௨ 2௧

FIRST SEMESTER (CBCSS—UG) DEGREE EXAMINATION
NOVEMBER 2023
Chemistry
CHE 1B 01—THEORETICAL AND INORGANIC CHEMISTRY—I
(2019—2023 Admissions)
Time : Two Hours Maximum : 60 Marks
Section A (Short Answers)

Answer questions up to 20 marks.
Each question carries 2 marks.

1. Discuss about the first aid for burns due to phenol and bromine.
2. Give Lux- Flood definition for acid and base. Give example.

3. Discuss about Pauling’s and Mulliken’s approaches to calculate electronegativities of different
elements.

4. What are the factors determining ionization enthalpy ?

5. What is meant by standard solution ? What are the qualities which a primary standard should
have ?

6. What is meant by effective nuclear charge ? Calculate the effective nuclear charge at the periphery

of nitrogen atom.
7. What is meant by redox titration ? Why KMnO, is not used as a primary standard ?
8. Give answer to the correct number of significant figures :
a) 42.71¢+9643¢+80g=?
b) 0.165 713 > 10.487 kgm = ?
9. What is group displacement law ? Explain with example.

10. The amount of Carbon- 14 in a piece of wood is found to be one-sixth of its amount in a fresh piece
of wood. Calculate the age of wood, (¢,). of C-14 is 5760 years)

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