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Calculate mass of 10^20 atoms of oxygen....

Calculate mass of `10^20` atoms of oxygen.

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OMEGA PUBLICATION-SAMPLE QUESTION PAPER -v (PUNJAB)-QUESTION
  1. Prove that pH + pOH = 14.

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  2. Define empirical formula and molecular formula ? How are they related ...

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  3. Calculate mass of 10^20 atoms of oxygen.

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  4. What is diborane ? Give its structure.

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  5. Explain why: Al utensils should not be kept in water over night.

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  6. Explain why Al wire is used to make transmission cables.

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  7. Distinguish between classical and photochemical smogs.

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  8. Define disproportionisation and simple displacement redox reactions.

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  9. Which out of NH(3) and NF(3) have higher dipole moment and why?

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  10. C Cl4 is not hydrolysed but SiCl4 can be hydrolysed with water. Why ?

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  11. Derive van der Waals’ equation of State for n moles of gas.'

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  12. Calculate the kinetic energy of 0.2 g of H2 at 27^@C.

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  13. Calculate enthalpy of the reaction : 4NH3(g) +3O2(g) rarr 2N2(g)+ 6H2O...

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  14. State and explain Le chatelier's Principle. What are its applications.

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  15. BF3 acts as a Lewis acid. Why ?

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  16. Can you prepare a solution having pH more than 14 ?

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  17. Write IUPAC name of the following compounds C(6)H(5)-CH = CH-CH(2)C...

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  18. Write IUPAC name of the following compounds CH(3)-CH = CH-C = CH

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  19. Out of the following plants which are known as herbs- Mango tree, Basi...

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  20. Why tirtary carbocations are more stable than, secondary and primary c...

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