Andhra Pradesh Board Class 12 Chemistry Sample Papers 2011

ANDHRA PRADESH BOARD
CLASS 12
CHEMISTRY
Time: 3 hours
Max. Marks: 60
Instructions to candidate :

Answer all questions of Section ‘A’. Answer any six questions in Section ‘B’ and any two questions in Section ‘C’.
In Section ‘A’, questions from Sr. Nos. 1 to 10 are of “Very short answer type”. Each question carries two marks. Every answer may be limited to 2 or 3 sentences. Answer all these questions at one place in the same order.
In Section ‘B’, questions from Sr. Nos. 11 to 18 are of “Short Answer type”. Each question carries four marks. Every answer may be limited to 75 words. In Section ‘C’, questions from Sr. Nos. 19 to 21 are of “Long answer type”. Each question carries eight marks. Every answer may be limited
to 300 words.

SECTION - A
Note : Answer "all" the questions

1)Define RMS Velocity? If the RMS Velocity of CO2 gas is 4.4 x 10 Cm/Sec. At a given tempereture, find the RMS Velocity of Ethane
2) Explain Boyle’s and Charle’s Lawas basing on the postulates of kinetic molecular theory of gases.
3) How Hydrogen peroxide renovates the old spoiled oil paintings Explain it with relevent reaction.
4) Explain the stages with equations that are involved in the production of an hydrous magnesium chloride from carnallite.
5) What is allotrophy? Explain the Structure of anyone of the Crystalline forms of Carbon.
6) Balance the following ionic equation (redox reaction) in basic medium by ion-election method. ‘u
   Cr (OH)3 + IO33 I + CrO42-

7) Write the corresponding equations for the following reactions and name the products.
H2/N:
1200C
Br2/CCL4

8) Calculate the wavelength of a particle having 10 mg. of mass and

9) Calculate the Oxidation number of sulphur in H2SO4 and H2S208.

10) In Xe O3, ‘Xe’ shows Sp3 hybridisation but the shape is Pyramidal. Note :
   4 x105 Cm/Sec. Velocity? Give the reason?

11) Why Na+ is having more IP than Na. 19)

12) The molecular weight of a unknown hydrocarbon gas is equal to the State the Principles involved in writing the electronic configuration of mass of 11.2 lit of O2 at STP. Name the hydrocarbon. atoms Explain them with example and necessary diagrame.

13) What is the Co-ordination number of ionic crystal with limiting radius Explain the classification of elements into S, P, d, f blocks present in ratio of O.732 to 0.999. the periodic table.

14) Define hybridisation of atomic orbitals? Explain the Sp3 and Sp2
  
15)hybridisations with respect to ethane and ethylene molecules?

16) What is hyperol? Give its formula.

17) Write any two effects of depletion of ozone layer.

18)Explain with example positional and functional isomerisms.

SECTION - C

19)What is ammonal and give its use?

20)Name two gases which are responsible for global warning.