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4

Precipitation takes place when

A. ionic product < Ksp

B. ionic product > Ksp

C. ionic product2=Ksp 

D. ionic product = Ksp

Correct Answer :

B. ionic product > Ksp


Related Questions

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4

Strength of an acid depends on

A. hydrolysis

B. concentration of OH- ions

C. concentration ofH+ ions

D. no. of moles of base used for neutralisation

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4

If NH3 is dissolved in water, pH of the solution

A. decreases

B. increases

C. remains unchanged

D. may increase or decrease

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4

Sum of pH and pOH of an acidic solution at 25°C is

A. 0

B. 14

C. depends on pH of base

D. depends on pH of acid

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4

During salt analysis NH4OH is added before adding NH4OH for third gp., cation analysis so as to

A. increase the concentration ofOH- ions

B. increase the concentration of ammonia

C. increase the concentration of chloride ions

D. prevent the precipitation of hydroxides of subsequent groups

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4

According to Bronsted Lowry an acid is

A. that gives cation in solution

B. one that gives H+ ions in solution

C. electron acceptor

D. proton donor

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4

On dissolving copper sulphate in water pH of the solution

A. decreases

B. increases

C. remains unchanged

D. may increase or decrease

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4

pH of a solution is 10. Hydroxide ion concentration in the solution is

A. 10-10 gm eq.

B. 10-4 mole liter-1

C. 10-4 gm liter-1

D. 10-3 gm eq.

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4

On dissolving sodium chloride in water pH of the solution

A. decreases

B. increases

C. remains unchanged

D. increase or decreases

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4

A solution is said to be saturated w.r.t the electrolyte it contains if

A. ionic product < Ksp

B. ionic product > Ksp

C. [ionic product]2 = Ksp

D. ionic product = Ksp

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4

2 gm of NaOH is dissolved in one litre water. pH of the solution will be

A. 12.7

B. 11.7

C. 1.3

D. 17.7

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4

0.1 M acetic acid ionise to an extent of 1.34%. Ionisation constant of acetic acid is

A. 0.00134

B. 1.182

C. 1.82 x 10-5

D. 2.8 x 10-61CF6

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4

In III gp of salt analysis for cations NH4CL and NH4OH are added as group reagents. Which of the following can be used instead of NH4CL ?

A. NH4NO3

B. NaCL

C. NH42SO4

D. NH42C2O4

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4

pH of 0.1 M monoprotic acid is 4. Then dissociation constant of the acid is :

A.  9

B. 10-7

C. 10-5

D. 1-3

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4

Which of the following is not hydrolysed in water ?

A. HCOONa

B. KCN

C. K2CO3

D. KC1

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4

pH of a solution is 8.5. solution is

A. amphoteric

B. neutral

C. acids

D. basic

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4

CH3COOH+H2H3O++CH3COO-
In the above reaction acid is

A. H3O+

B. H2O

C. CH3COOH

D. CH3COOH and H3O+

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4

In an aquous solution of silver bromide concentration of Ag+ is 1×10-6 mol lit-1. If Ksp for AgBr is
4 x 10-13 then concentration of Br in the solution is

A. 4 x 10-8 mole liter-1

B. 2 x 10-19 mole liter-1

C. 4 x 10-7 mole liter-1

D. 2 x 10-5 mole liter-1

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4

At a given temperature PbI2 will be more soluble in

A. water

B. 0.02 M Nal

C.  O.4 M Pb NO32

D. 0.02 MKI

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4

Ionisation constant of formic acid is 1.8 x 1.8×10-4 at 298 K. In 0.1 NHCOOH the percentage ionisation of HCOOH acid is

A. 0.18

B. 42.4

C. 4.24

D. 2.89

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4

Which of the following is not hydrolysed in water ?

A. HCOONa

B. KCN

C. K2CO3

D. KC1

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4

Ostwald dilution law is applicable for :

A. weak electrolytes

B. strong electorate

C. basic

D. acids

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4

 Molar concentration of Ag+ in an aqueous solution of Ag2CrO4 at 298K is 1.5 x 10-4 Ksp, for Ag2CrO4 is

A. 1.125 x 10-8

B. 2.5 x 10-4

C. 2.25 x10-8

D. 1.6875 x 10-12

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4

pH of 0.1 M monobasic acid is 4 then molar concentration of H+ per litre will be

A. 10-8

B. 20×105

C. 10-3

D. 10-4

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4

Acetic acid is weak acid because it is

A. organic acid

B. immiscible with water

C. slightly ionised

D. viscous

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4

pH of 0.001 M NaOH aqueous solution is

A. 2

B. 5

C. 11

D. 9

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4

Which of the following is not a Lewis acid?

A. ZnCL2

B. BF3

C. H2O

D. Ag+

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4

On dissolving sodium carbonate in water pH of the solution

A. decreases

B. increases

C. remains unchanged

D. may increase or decrease

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4

Precipitation takes place when

A. ionic product < Ksp

B. ionic product > Ksp

C. ionic product2=Ksp 

D. ionic product = Ksp

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4

Decinormal solution of acetic acid ionised to an extent of 1.3%. pH of this solution will be (log 1.3 = 0.11)

A. 3.89

B. 2.89

C. 4

D. 1.0

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4

Which of the following will favour the reverse reaction in a chemical equilibrium?

A. Increasing the concentration of one or more of the products

B. Decreasing the concentration of one of the products

C. Removal of at least one of the products at regular intervals

D. None of the above