At equilibrium, the rate of dissolution of a solid solute in a vo

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 Multiple Choice QuestionsMultiple Choice Questions

501.

R - CH2 - CH2 - OH can be converted into RCH2CH2COOH by the following sequence of steps.

  • PBr3, KCN, H2 /Pt

  • PBr3, KCN, H3O+

  • HCN, PBr3, H3O+

  • KCN, H3O+


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502.

At equilibrium, the rate of dissolution of a solid solute in a volatile liquid solvent is

  • less than the rate of crystallisation

  • greater than the rate of crystallisation

  • equal to the rate of crytallisation

  • zero


C.

equal to the rate of crytallisation

At equilibrium, rate of dissolution of solute in a volatile liquid solvent is equal to rate of crystallisation.


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503.

pKa of acetic acid and pKb of ammonium hydroxide are 4.76 and 4.75 respectively. Calculate the pH of ammonium acetate solution.

  • 6.02

  • 7.005

  • 8

  • 5.602


504.

The value of Kc for the reaction,

2A  B + C is 2 x 10-3. At a given time, if the composition of reaction mixture is [A] = [B] = [C] = 3 x 10-3 M. Which is true?

  • The reaction will proceed in forward direction

  • The reaction will proceed in backward direction

  • The reaction will proceed in any direction

  • None of the above


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505.

For the homogeneous reaction,

4NH3 + 5O2  4NO + 6H2O

the equilibrium constant Kc has the units

  • conc.+10

  • conc.+1

  • conc.-1

  • it is dimensionless


506.

Ammonia is a Lewis base and it forms complexes with many cations. Which one of the following cations does not form a complex with ammonia?

  • Ag+

  • Cu2+

  • Cd2+

  • Pb2+


507.

Argol, a brown crust, formed during the fermentation of grape juice contains

  • CO2

  • fused oil

  • potassium hydrogen tartarate

  • lye


508.

The pH value of 0.001 M aqueous solution of NaCl is

  • 7

  • 4

  • 11

  • unpredictable


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509.

Which buffer solution comprising of the following has its pH value greater than 7?

  • CH3COOH + CH3COONa

  • HCOOH + HCOOK

  • CH3COONH4

  • NH4OH + NH4Cl


510.

10-6 M NaOH is diluted 100 times. The pH of the diluted base is

  • between 7 and 8

  • between 5 and 6

  • between 6 and 7

  • between 10 and 11


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