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Sunday, March 17, 2013

10+1 PSEB Chemistry Sample Paper


Subject – Chemistry
  1.  Define Isotopes & Isobars with examples.
  2.  Define Enthalpy and Avogadro law.
  3.  Write general configuration of P block elements.
  4.  Define Reduction .
  5.  Define global warming & one factor responsible for it.


6.   Explain why cations are smaller and anions are larger  in radii than their parent atom?
  7.  What are major differences between metals and non metals? Give an example of  liquid metal at room temperature.
  8.  Describe the property of catenation with example of carbon.
  9.  Calculate the oxidation number of S in H2SO4& N in HNO3.
10.  Draw molecular orbital diagram of H2, H2+ & He2.
11.  Define Hyper conjugation effect with example.
12.  Calculate number σf & π bonds in the following structure/ following  molecule.
            CH2=    CH2       CH2Cl2
13.  Balance the following redox reaction by Ion electron method
       Cr2O2- 7 (aq)+ SO2(g)→ Cr3+ (aq)+ SO42-(aq) in acidic solution.
14.  Define oxidation. Calculate the oxidation number of:
       1. S in H2S             2. C in CO2                               3. Pb in Pb3O4
15. Describe usefulness of Bohar's model. Calculate the mass of a photon with wavelength 3.6 A°.
16.  Define resonance with examples. Draw resonance structure of Benzene & Ozone.
17.  Define covalent bond. Draw structure of CH4 & H2O.
18.  Write a short note on hydrogen bonding.
19.  Write about unique position of hydrogen in periodic table.
20.  Write a brief note on carbocation & carbanion with example.
21.  Select Electrophiles & nucleophiles out  of H+, Na+, NH3, OH-, C2H5OH, C1-.
22.  Write definitions of 3 gaseous laws.A vessel of 120ml capacity contains a certain mass of a gas at 20° c and 750mm pressure. The gas was transferred to a vessel is 18

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