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State and explain Le- Chateller's princi...

State and explain Le- Chateller's principal

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ICSE-EQUILIBRIUM -SHORT ANSWER TYPE QUESTIONS
  1. Apply law of mass action to the dissociation of Na2SO4.

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  2. Apply law of mass action to the process, N2(g) + 3H2 (g) hArr 2...

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  3. State and explain Le- Chateller's principal

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  4. Why is pure water regarded as a weak electrolyte ?

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  5. Bromine water is brown and weakly acidic due to following equilibrium ...

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  6. What do you understand by conjugate pairs of acid and base? Sort ...

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  7. What do you understand by conjugate pairs of acid and base? Sort ...

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  8. The dissociations constant (Kb) " for " NH3 ,CH3NH2, (CH2)2 NH and (...

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  9. Sort out the Lewis acids and Lewis bases among the following: Cl...

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  10. Why is pure water neutral although it contains H3O^(+) ions?

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  11. What do you understand by pH value and pH scale ? Explain.

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  12. Calculate the pH value of the solution in which the concentration of O...

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  13. What is meant by common ion effect ?^(**"**)

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  14. Why does the pH of an acidic buffer remian constant even when a few ...

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  15. In qualitative analysis. Explain why The cations of group II are pr...

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  16. In salt analysis. Explain why NH4Cl is added before the addition ...

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  17. Can NaOH be used in place of NH4OH to precipitate the cations of gr...

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  18. What is the condition for a salt to get precipitated from its saturat...

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  19. An acidic solution contains both Zn^(2+) and Hg^(2+) ions. Which i...

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  20. What is the principle of selective precipitations ?

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