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Environmental Chemistry
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Environmental Chemistry
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25 Questions

1. Which one of the following information can beobtained on the basis of Le Chatelier principle?
2. Which of the following is least likely to behave as Lewis base?
3. Which one of the following statements is not true? [2013]
4. Which has the highest value of pH?
5. The ionization constant of ammoniumhydroxide is 1.77 × 10 -“5 at 298 KHydrolysisconstant of ammonium chloride is:
6. Buffer solutions have constant acidity andalkalinity because
7. Which of these is least likely to act as Lewisbase?
8. Identify the correct order of solubility inaqueous medium:
9. At 100° C the K w of water is 55 times itsvalue at 25°CWhat will be the pHof neutralsolution? (log 55 = 1.74)
10. Equal volumes of three acid solutions of pH 3 - 4 and 5 are mixed in a vesselWhat will be theH+ ion concentration in the mixture?
11. Which one of the following compounds isnot a protonic acid?
12. The solubility product of a sparingly solublesalt BA2 is 4 × 10-“12The solubility of BA 2 is
13. In which of the following the solubility of AgClwill be maximum?
14. Among boron trifluoride - stannic chlorideand stannous chloride - Lewis acid is representedby
15. Equimolar solutions of the following substances were prepared separately. Whichone of these will record the highest pHvalue?
16. The rapid change of pHnear thestoichiometric point of an acid-base titration isthe basis of indicator detectionpHof thesolution is related to ratio of the concentrationsof the conjugate acid (HIn) and base (In-“ ) formsof the indicator by the expression
17. The compound whose aqueous solution has the highest pH is
18. The pH value of blood does not appreciablychange by a small addition of an acid or a base - because the blood
19. Which of the following pairs constitutes abuffer?
20. Green chemistry means such reactions which:[2008]
21. A base when dissolved in water yields asolution with a hydroxyl ion concentration of 0.05 mol litre -1 The solution is
22. Solubility of a M2S salt is 3.5 × 10 -“6 - then itssolubility product will be
23. The greenhouse effect is because of the[1996]
24. 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
25. 0.1 M solution of which one of thesesubstances will be basic?

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