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D 32343 (Pages : 2) வாரி? அவைத்‌ வைக

FIRST SEMESTER (CBCSS—UG) DEGREE EXAMINATION
NOVEMBER 2022

Chemistry
CHE 1B 01—THEORETICAL AND INORGANIC CHEMISTRY—I
(2019—2022 Admissions)
Time: Two Hours Maximum : 60 Marks
Section A (Short Answers)

Answer questions up to 20 marks.

Each question carries 2 marks.

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Distinguish between primary and secondary data.

Specify the major difficulties in the formulation of hypotheses.

What do the R and S phrases stand for ?

Calculate the normality of oxalic acid solution prepared by dissolving 1.575g in 250 mL.
Ionization enthalpies of Be and N are higher than expected. Why ?

What is the effective nuclear charge in a polyelectronic atom ?

Briefly explain the inert pair effect with an example.

State Born Lande equation.

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‎What is the Lux-Flood definition of acids and bases ?

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‎What are amphoteric oxides ? Suggest a couple of examples.

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‎Calculate the decay constant of a radioactive element decayed to its 10 % of initial amount in
10 days.

‎12. Comment on the stability of the nucleus considering the proton-proton electrostatic repulsion into

‎account.

‎[Ceiling of marks : 20]

‎Turn over

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