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FIRST SEMESTER (CBCSS—UG) DEGREE EXAMINATION, NOVEMBER 2021
Chemistry
CHE 1B 01—THEORETICAL AND INORGANIC CHEMISTRY—I
(2021 Admissions)
Time : Two Hours Maximum : 60 Marks
Section A (Short Answers)

Answer at least eight questions.
Each question carries 3 marks.
All questions can be attended.

Overall Ceiling 24.

1. What is meant by scientific observation ?

2. Name four branches of chemistry.

3. Explain and illustrate term accuracy with regard to analytic result.
4. What is a dessicant ? Give an example.

5. Explain term electron affinity.

6. Explain and draw atomic radius and covalent radius.

7. What are soft acids ?

8. Explain lux flood definition of acid and base.

9. Define dipole moment and what is its expression and unit.
10. Draw the structure of borazine.
11. Explain one use of radioisotopes in medical diagnosis.
12. What is mass defect ?

(8 x 3 = 24 marks)
Section B (Short Essays)

Answer at least five questions.

Each question carries 5 marks.

All questions can be attended.
Overall Ceiling 25.

13. Explain and discuss criteria for scientific hypothesis.

14. Write short note on lab safety practices. Turn over

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