AP Intermediate: 1st year Chemistry Model Paper



TIME : 3 HOURS]                                                                                                                                    [ MAX. MARKS : 60

SECTION-A                                                              10×2=20
NOTE : Answer all the questions


  1. Calculate the R M S speed of nitrogen molecules at 27~C ?
  2. What is disproportionation reaction? Give example.
  3. Calculate the pH of 0.05M Ba(OH)Ї solution.
  4. Write the biological importance of magnesium and calcium
  5. Give the reactions that takes place at anode and cathode in Castner-Kellner process.
  6. Graphite is a good conductor of electricity, Why?
  7. What is allotropy ? Name two crystalline allotropes of carbon.
  8. Define the terms C O D and B O D?
  9. What are the harmful effects of acid rains?
    1. G ive the structural formulae of the following compounds (a)2,3- dimethyl butane (b) 2-methyl but-1-ene


SECTION-B                                                                  6×4=24 NOTE: Answer any Six of the following questions.

  1. Write any four postulates of kinetic molecular theory of gases.
  2. Balance the following redox equation in acidic medium by ion-electron method

MnOЉЁ + CЇKЉ~Ёї Mn²~ + COЇ

  1. State Hess’s law of constant heat summation. Explain with one example.
  2. Derive the relation between K~ and K~ for the equilibrium reaction


  1. Explain electrolytic method of preparation of hydrogen peroxide.
  2. Explain the structure of diborane on the basis of VBT
    1. Explain (a) position Isomerism and (b) functional group Isomerism with one example for each of them.
    2. Explain (a) Wurtz reaction and (b) Friedel- Craft’s alkylation with one example for each of them.


SECTION-C                                                                                         2×8=16 NOTE : Answer any Two of the following

  1. What are Quantum Numbers? Explain the significance of the four quantum numbers associated with an electron.
  2. Define first and second ionisation potentials. Why the second ionisation potential of an element is always greater than it’s first ionisation potential? Explain any four factors that affect the ionisation potential of an element.
  3. (a) Explain sp³d hybridization with one example.

(b) Explain the molecular orbital theory of oxygen molecule.Calculate it’s bond order and explain it’s magnetic property.

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