The pOH of a solution is 6.0. Its pH will be from Chemistry Equi

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 Multiple Choice QuestionsMultiple Choice Questions

261.

Which of the following is not a buffer solution?

  • 100 mL 0.1 M CH3COOH+ 50 mL 0.1 M CH3COONa

  • 100 mL 0.1 M CH3COOH+ 50 mL 0.1 M  NaOH

  • 50 mL 0.1 M CH3COOH+ 100 mL 0.1 M  NaOH

  • 100 mL 0.1 M NH4OH+ 50 mL 0.1 M  HCl


262.

If Ksp Of Ag2S is 10-17, the solubility of Ag2S in 0.1 M solution of Na2S will be

  • 10-8

  • 5 × 10-9

  • 10-15

  • 10-16


263.

The pH values of 0.1 M solution of HCl, CH3COOH, NH4Cl and CH3COONa will have the order

  • HCl <CH3COOH < NH4Cl <CH3COONa 

  • CH3COONa <NH4Cl<CH3COOH <HCl

  • NH4Cl <CH3COONa <CH3COOH <HCl

  • All will have same pH value


264.

For the titration of solution of oxalic acid and sodium hydroxide, the suitable indicator is

  • phenolphthalein

  • methyl orange

  • any of these

  • None of these


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265.

Consider the two gaseous equilibria involving SO2 and the corresponding equilibrium constants at 298 K

SO2 (g) + 12O2 (g)  SO3 (g); K1

2SO3 (g)  2SO2 (g) + O2 (g); K2

The values of the equilibrium constants are related by

  • K2 = K1

  • K2 = K12

  • K21K12

  • K21K1


266.

For the reaction,

A + B  C + D,

the initial concentrations of A and B are equal. The equilibrium concentration of C is two times the equilibrium concentration of A. The equilibrium constant is

  • 4

  • 14

  • 9

  • 19


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267.

The pOH of a solution is 6.0. Its pH will be

  • 6

  • 8

  • 0

  • 14


B.

8

pH + pOH = 14

pH + 6 = 14

pH = 14 - 6 = 8

Therefore, pH is 8.


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268.

Solubility products of Al(OH)3 and Zn(OH)are 8.5 × 10-23 and 1.8 × 10-4 respectively. If both Al3+ and Zn2+ ions are present in a solution, which one will be precipitated first on addition of NH4OH?

  • Al(OH)3

  • Zn(OH)2

  • Both (a) and (b)

  • None of these


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269.

The weakest acid among the following is

  • CH3COOH

  • CH2ClCOOH

  • CHCl2COOH

  • CCl3COOH


270.

Nitric acid ionises slightly in HF,

HNO3 + HF  H2NO3+ + F-(Solvent) Then.

  • HNO3 and H2NO3+

  • HF and F- are bases

  • HNO3 and F- are bases

  • only HNO3 is base


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