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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

Correct Answer :

C. remains unchanged


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

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

Solubility of calcium carbonate is 0.0305 gm/litre.Kspfor CaCO3 is

A. 0.000305

B. 193 x 10-8

C. 9.3 x10-8

D. 93.05 x1-5

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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

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

Conjugate base of HCO3-is

A. HCO32-

B. HCO3+

C. H2CO3-

D. CO32-

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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

Ostwald dilution law is applicable for :

A. weak electrolytes

B. strong electorate

C. basic

D. acids

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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

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 carbonate in water pH of the solution

A. decreases

B. increases

C. remains unchanged

D. may increase or decrease

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4

BaSO4(Mol. wt 233) has solubility 0.009 gmlit-1 at 298 K. Its solubility product is

A.  1.521 x 10-5

B. 152.1 x 10-1910"19

C. 1.9 x 10-5

D. 15.21 x 10-9

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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

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

pH of a solution is 8.5. solution is

A. amphoteric

B. neutral

C. acids

D. basic

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4

Degree of ionisation depends on

A. temperature

B. nature of solvent

C. neither (a) nor (b)

D. both (a) and (b)

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4

Kspfor AgCl (mol wt 143.5) is 17 x 10-11 at 298K. The molar solubility of AgCl at 298 Kis

A. 18.7 x10-5

B. 2.3 x 10-3

C. 9.90 x 10-3

D. 1.3 x 10-5

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4

An aqueous solution of sodium acetate is

A. amphoteric

B. halogenic

C. alkaline

D. acidic

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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

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

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

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

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 hydrolysed in water ?

A. HCOONa

B. KCN

C. K2CO3

D. KC1

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4

An aqueous solution CaF2 contains 2 x 10-4mole lit-1 of CaF2. Ksp for CaF2 is

A.  16 x 10-8

B. 3.2 x 1010-11

C. 3.2 x 10-6

D. 0.156 x 10-2

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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

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 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

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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

If NH3 is dissolved in water, pH of the solution

A. decreases

B. increases

C. remains unchanged

D. may increase or decrease