Chemical Equilibrium

What is the formula for Ionization Constant of Acids?

Answer explanation

Kc = [H30][A-]

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[HA]

Law of mass action derived by Guldberg and Waage in

• 1909

• 1906

• 1846

• 1864

In synthesis of ammonia by Haber's process the optimum condition for pressure is

• 150-160 atm

• 170-200 atm

• 200-300 atm

• 300-350 atm

What are buffer solutions?

Answer explanation

A solution that resists change in its pH when small amount of an acid or a base is added to it.

What can affect the magnitude of equilibrium constant Kp of a reversible gaseous reaction?

• Temperature

• Pressure

• Catalyst

• Concentration

How much nitrogen fixation on Earth is being done by Haber's process?

• 10%

• 13%

• 16%

• 25%

Which one of the following aqueous solutions has the highest pH?

• 0.1 M NaOH

• 0.1 M HCl

• 0.2 M H2SO4

• 0.1 M HNO3

The concept of pH was introduced by

• Henderson

• Thomson

• Sorenson

• Raoult

Which acid has less value of pKa?

• CH3COOH

• H2S

• H2CO3

• HCl

A basic per solution can be prepared by mixing

• Weak acid and its salt with strong base

• Strong acid and its salt with weak base

• Weak base and its salt with strong acid

• Strong base and its salt with weak acid