B.Sc-B.Sc Chemistry 2nd Sem Physical and Inorganic Chemistry(University of Pune, Pune-2013)
F.Y. B.Sc.
CHEMISTRY - I
SEAT No. :
[Total No. of Pages : 3
Physical and Inorganic Chemistry
(Paper - I) (2008 Pattern) (Theory)
Time : 3 Hours] [Max. Marks : 80
Instructions to the candidates :
1) All questions are compulsory.
2) Draw neat diagrams wherever necessary.
3) Figures to the right indicate full marks.
Q1) Answer the following questions :
Find the value of y in the equation y = 10–0.2218.
Define the term surface tension.
What is the effect of temperature on viscosity? Explain the term catalyst with example.
State second law of thermodynamics in the form of entropy.
BeF2 is linear but SF2 is angular. Why?
How many moles are present in 90 grams of water.
What are the types of hydrogen bond.
Q2) a) Attempt any four of the following : [8]
Calculate the pH of 1.2 × 10–3M HCl.
Find the value of x if loge 6.321 = x.
State any two rules of derivative.
Find the equation of line passing through the two points (– 1, – 1) and (2, 6).
Arrange the following equation in the form of y = mX + C and find
out slope and intercept. 15 y = X + 30.
x dy
- If y = x2 +1 , find dx .
- y =(3x2 +3 + .
- ò2 x3.dx=?
b) Define the term surface tension. Explain its determination by capillary
method. [4]
c) Attempt any one of the following : [4]
Calculate the pressure exerted by one mole of CO2 at 127ºC when
it occupies a volume of 0.5 liter.
(Given : a = 3.66 atm l2 mole–2; b = 0.0428 l mole–1 and R = 0.082
lit atm k–1 mole–1).
Calculate the entropy change when one mole of an ideal gas is
heated from 100ºC to 200ºC at constant pressure. When Cp is 7.88 cal deg–1 mole–1.
Q3) a) Attempt any three of the following : [12]
Describe Thomson’s method for the determination of e/m ratio of an electron.
Explain the concept of entropy. Discuss its physical significance.
Define viscosity of a liquid. Give its unit. Discuss the method to measure the viscosity of liquid by Ostwald’s method.
What is enzyme catalysis? Explain its characteristics.
b) Attempt any one of the following : [4]
i) Calculate the wavelength of the spectral line in the Lyman series
when electron jumps from fourth orbit.
ii) Calculate the energy of electromagnetic radiation of
wavelength 500 nm.
Q4) a) Attempt any three of the following : [12]
i) State different methods for preparation of colloids. Describe any
one method in detail.
ii) What are the drawbacks of Rutherford’s atomic model.
iii) Distinguish between emulsion and gel.
iv) Explain the adsorption theory of catalysis with the help of suitable
example.
v) What are quantum numbers? Give their significance.
b) Attempt any one of the following : [4]
i) Explain the effect of hydrogen bonding on solubility in water and
viscosity of compound.
ii) What is hybridization? Explain formation of CH4 molecule.
[4317]-5 2
Q5) a) Attempt any two of the following : [6]
What is heavy water? How it is obtained? Give its any one property.
Give the assumptions of VSEPR theory.
How will you prepare?
1) 300 ml of 0.1N solution of oxalic acid (H2C2O4.2H2O).
2) 200 ml of 0.05N solution of NH4Cl.
(Given : At.wt. of H = 1, C = 12, O = 16, N = 14, Cl = 35.5).
b) Attempt any two of the following : [10]
Explain the formation of HF and N2 molecules on the basis of valence bond theory.
State postulates of Heitler - London theory.
How will you prepare 0.25 N, 500 ml Hydrochloric acid solution
from concentrated hydrochloric acid solution whose specific gravity is 1.18 and contains 35% HCl by weight.
| Earning: Approval pending. |
