INTERMEDIATE-1st YEAR CHEMISTRY
Model Paper-3
Time-3hours Maximum marks:60
SECTION_A (10x2=20M)
NOTE: Answer all questions.
1. calculate the oxidation state of i)cr in K CrO 2 4 and ii) N in NH NO 4 3 .
2. What is the effect of Temperature on
I. vapour pressure ii. Surface tension.
3. What is the nature of aqueous solution of Na CO 2 3 ?why?
4. Write the average composition of Portland cement.
5. What is meant by inert pair effect? Give the stable oxidation state of
6.what is producer gas? The calorific value of producer gas is lower than that of
syn gas. why?
7.Calculate the Enthalpy change for the complete combustion of 29gm of Butane
if 4 10 2 2 2
C H O g CO g H O g l + → + ∆ H= -2658KJ
13 ( ) ( ) 4 ( ) 5 ( ),
8. Define the terms ‘Eutrophication’ and ‘Bioamplification’.
9. Write any two adverse effects caused by acid rain.
10. How is Ethylene is prepared from ethylalcohol? give equation.
2
SECTION-B
NOTE: Answer any Six of the following (6x4m=24marks)
11.Deduce a)Boyle’s law and b)Dalton’s law from kinetic gas equation.
12. Balance the following equation by Ion electron method
− − + → +
P OH PH H PO 4 3 2 2
13.State and explainthe Hess’s law of constant heat summation.
14.Explain the differences in propertiesof diamond and graphite on the basis of
their structures.
15.State Le -Chatelier principle. Discuss the favourable conditions for the
Haber’s ammonia synthesis by applying Le -Chatelier principle.
16. Write a note on Heavy water.
17.Explain Chain and functional isomerism with one example each.
18.Name the products A,B and C in the following sequence of reactions.
o water Fe c CH Cl AlCl CaC A B C → → → +
3 3 ,500
SECTION -C
NOTE: Answer any three questions (2X8=16M)
19. What are the basic postulates of VSEPR theory?Discuss the shape of
Methane and Ammonia molecules on the basis of VSEPR theory.
20. State and explain the following with suitable examples.
a)Auf-bau principle b) Pauli’s principle c) Hund’s rule.
21. Define first and second ionization potentials. Why is the second ionization
potential greater than the first ionization potential? Discuss anythree factors
affecting IP values of elements?
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