February 6, 2018

Junior Intermediate Chemistry Model Paper - 1 for AP and TS Exams


I. i) Very short answer type questions.
ii) Answer All the questions.
iii) Each question carries TWO marks. (10 × 2 = 20 M)
1. What is gypsum? Why it is added to cement?
2. Si F6−2 is known while Si Cl6−2 is not - Explain.
3. What are "Lewis acids" and "Lewis bases"?
4. Calculate Kinetic energy of 3 moles of CO2 at 27°C in calories units.
5. Write colour & magnetic behaviour of Na in liquid NH3 solution in cold condition & hot condition.
6. What are significant figures? How many significant figures are present in ⎯ ?
7. What are "Receptor" and "Sink"?
8. Why graphite is good conductor? How it functions as a lubricant? Explain.
9. What is B.O.D.? Give its value for highly polluted water.
10. What will happen if two different alkyl halides undergo Wurtz reaction?


II. i) Short answer type questions.
ii) Answer any SIX questions.
iii) Each question carries FOUR marks. (6 × 4 = 24 M)
11. Explain the strucuture of DIBORANE.
12. Write the postulates of kinetic molecular theory of gases.
13. Define 'heat capacity'. Derive CP − CV = R
14. Balance the following redox reaction by ion - electron method in acid medium. 
MnO4− + C2O4−2 ⎯→ Mn+2 + CO2
15. Define a) Homogeneous equilibrium and
b) Law of chemical equilibrium
16. Write in brief on a) Salt hydrides b) Molecular hydrides
17. How does acetylene reacts with
a) H2O b) Br2, CCl4
c) Hydrogen halide d) red hot copper tube
18. What do you understand about geometrical isomerism?
Write E, Z configurations of alkene contains −Cl, −Br,
−CH2CH2OH & −CH(CH3)2


III. i) Long Answer Type questions.
ii) Answer any TWO questions.
iii) Each question carries EIGHT marks. (2 × 8 = 16 M)
19. Write the important postulates of Bohr's atomic model and explain how spectral lines are formed in the hydrogen spectrum with a neat diagram.
20. What is periodic property? Explain the following periodic trends.
a) Atomic size b) Electronegativity
c) Ionization Enthalpy d) Electron gain Enthalpy
21. Give the molecular orbital energy diagram of N2 and O2. Write the bond order and magnetic behaviour of N2 and O2.

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