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Environmental Chemistry
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Environmental Chemistry
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25 Questions

1. A physician wishes to prepare a buffersolution of pH= 3.58 that efficiently resists achange in pHyet contains only small concentrations of the buffering agents. Which one of the following weak acids together with its sodium salt would be the best to use?
2. In which of the following the solubility of AgClwill be maximum?
3. 0.1 M solution of which one of thesesubstances will be basic?
4. Green chemistry means such reactions which:[2008]
5. Which of the following pairs constitutes abuffer?
6. The pH value of a 10 M solution of HCl is
7. The solubility product of a sparingly solublesalt BA2 is 4 × 10-“12The solubility of BA 2 is
8. Solution of 0.1 NNH 4OH and 0.1 NNH 4Cl haspH 9.25Then find out pK b of NH 4OH
9. The pH value of blood does not appreciablychange by a small addition of an acid or a base - because the blood
10. Which one of the following compounds isnot a protonic acid?
11. Aqueous solution of acetic acid contains
12. Which has the highest value of pH?
13. H2S gas when passed through a solution ofcations containing HCl precipitates the cations ofsecond group of qualitative analysis but notthose belonging to the fourth groupIt isbecause
14. Equimolar solutions of the following were prepared in water separately. Which one of thesolutions will record the highest pH?
15. The compound whose aqueous solution has the highest pH is
16. Equimolar solutions of the following substances were prepared separately. Whichone of these will record the highest pHvalue?
17. Which one of the following statements is not true? [2013]
18. Which one of the following information can beobtained on the basis of Le Chatelier principle?
19. Buffer solutions have constant acidity andalkalinity because
20. Which one of the following statements regarding photochemical smog is not correct?[2012]
21. Which one of the following molecularhydrides acts as a Lewis acid?
22. Among boron trifluoride - stannic chlorideand stannous chloride - Lewis acid is representedby
23. Solubility of a M2S salt is 3.5 × 10 -“6 - then itssolubility product will be
24. Solubility of MX2 -type eletrolytes is 0.5 ×10-“4 mole/lit - then find out K sp of electrolytes
25. Which of the following molecules acts as aLewis acid?

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