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OMEGA PUBLICATION-SAMPLE QUESTION PAPER -v (PUNJAB)-QUESTION
- What is the oxidation state of Cr in K(2)Cr0(3)
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- Explain Pauli’s exclusion principle.
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- Give two characteristics of homologous series.
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- Distinguish between oxidation number and valency.
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- What is screening effect ?
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- Prove that pH + pOH = 14.
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- Define empirical formula and molecular formula ? How are they related ...
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- Calculate mass of 10^20 atoms of oxygen.
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- What is diborane ? Give its structure.
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- Explain why: Al utensils should not be kept in water over night.
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- Explain why Al wire is used to make transmission cables.
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- Distinguish between classical and photochemical smogs.
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- Define disproportionisation and simple displacement redox reactions.
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- Which out of NH(3) and NF(3) have higher dipole moment and why?
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- C Cl4 is not hydrolysed but SiCl4 can be hydrolysed with water. Why ?
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- Derive van der Waals’ equation of State for n moles of gas.'
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- Calculate the kinetic energy of 0.2 g of H2 at 27^@C.
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- Calculate enthalpy of the reaction : 4NH3(g) +3O2(g) rarr 2N2(g)+ 6H2O...
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- State and explain Le chatelier's Principle. What are its applications.
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- BF3 acts as a Lewis acid. Why ?
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