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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

Correct Answer :

C. concentration ofH+ ions


Related Questions

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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

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

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

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

An aqueous solution of sodium acetate is

A. amphoteric

B. halogenic

C. alkaline

D. acidic

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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

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

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

For the reversible reaction
N2g+3H2g=2NH3gH is-93.7 Kj.
The equilibrium will shift in the forward direction if conc. of

A. NH3 is increased

B. N2 is decreased

C. N2 is increased

D. temperature is kept variable

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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 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

Conjugate base of HCO3-is

A. HCO32-

B. HCO3+

C. H2CO3-

D. CO32-

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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

Conjugate acid differs from its conjugate base by

A. proton

B. meson

C. electron pair

D. positron

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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

Ostwald dilution law is applicable for :

A. weak electrolytes

B. strong electorate

C. basic

D. acids

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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 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

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

A. H3O+

B. H2O

C. CH3COOH

D. CH3COOH and H3O+

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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

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

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

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

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

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

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

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

 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

Which of the following is not a Lewis acid?

A. ZnCL2

B. BF3

C. H2O

D. Ag+