Question # 1

pH of the human blood which is essentially maintained constant due to carbonates, biocarbonates, phosphates etc., is

Choose an answer

7.00

7.25

7.35

7.47

If the difference of pKa values of the two acids is 2, then

Choose an answer

Acid with smaller pKa is 10 times stronger acid

Acid with greater pKa is 10 times stronger acid

Acid with smaller pKa is 100 times stronger acid

Acid with greater pKa is 100 times stronger acid

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ion in filtrate?

Choose an answer

Ag⁺ and NO_3- only

Ag⁺ and Ba² and NO^-3

Ba² and NO^-3

Ba² and NO^-3and Cl-

Acetic acid is 1.33% ionized, In 1000 molecules of 0.1 M acetic acid the number of H⁺ions is

Choose an answer

1.33

13.3

1.33

1

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

Choose an answer

3.74

10.26

4.74

9.26

Choose an answer

Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

When the rate of formation of reactants is equal to the rate of formation of products, this is known as

Choose an answer

Chemical reaction

Chemical equilibrium

Chemical kinetics

None

The solubility product of AgCl is 2.0 x 10^-3 mol² dm^-6 , The maximum concentration of Ag ion in the solution is :

Choose an answer

2.0 x 10^-10 mol dm^-3

1.41 x 10^-10 mol dm^-3

1.0x 10^-10 mol dm^-3

4.0x 10^-10 mol dm^-3

K_avalue of HF acid is 6.7 x 10^-15the acid is a

Choose an answer

Weak acid

Moderately strong acid

Strong acid

Very weak acid

A solution has pH = 0, its H⁺ion concentration is

Choose an answer

1 x 10^-14

1 x 10¹⁴

1 x 10¹

1

Choose an answer

HF is stable and does not decompose even at 2000°C

HF is stable and slowly decomposes at 2000°C

HF is strong acid

HF produces equal moles of hydrogen and fluorine

Choose an answer

Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

In a reversible reaction, two substances are in equilibrium. If the concentration of each one is reduced to half, the equilibrium constant will be

Choose an answer

Reduced to half of its original value

Doubled

Same

Reduced to one fourth its original value

Which one of the following has no units of its K_cvalue

Choose an answer

Favour the formation of N₂O₄

Favour the decomposition of N₂O₄

Not alter the equilibrium

Stop the reaction

pH of 0.1 molar HCl solution is

Choose an answer

1

zero

13

14

K_bvalue of NH₄OH is 1.81 x 10^-5and its conjugate acid has K_a= 5.7 x 10^-10pKb of the base is 4.74, pKa of its conjugate acid is

Choose an answer

-4.74

4.74

10

9.26

Under what condition of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favourd

Choose an answer

High temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

:Low temperature and high pressure

Choose an answer

1

10

5

0.33

Choose an answer

4 mole per dm³

2 mole per dm³

0.33 mole per dm³

0.67 mole per dm³

Law of mass action was given by :

Choose an answer

Guldberg and Waage.

Berkeley and Hartly.

Ramsay and Reyleigh.

Berthelot.

A reaction is reversible because :

Choose an answer

Products are stable.

Reactants are reactive.

Products are reactive.

Reactants re stable.

pH and pKa of the buffer are related by Henderson equation which is

Choose an answer

High temperature

Low temperature

Low pressure

High pressure

Choose an answer

Moles^-2dm⁺⁶

No units

Mole dm^-3

Mole^-1dm^-3

The state of equilibrium refers to

Choose an answer

State of rest

Dynamic state

Stationary state

State of inertness

pH of 1 molar NaOH is

Choose an answer

7

zero

14

10

Choose an answer

0.12

0.50

0.25

4.00

Choose an answer

[A] = [B]

[A] < [B]

[B] = [C]

[A] > [B]

A solution of NaOH has pH = 13, then concentration of NaOH is

Choose an answer

10^-13M

10¹³M

10^-1M

10⁺¹M

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

Choose an answer

Increase in concentration of one of the reactants

Increase in concentration of one of the products

Removal of one of the products regularly

None of these

More Classes

Other Links

ECAT Chemistry Chapter 8 Chemical Equilibrium Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer