Unit of the equilibrium constant for H2 + CO2 H2O + CO is

  • no units
  • mol dm-3
  • dm3mol-1
  • [mol dm-3]-2

What percentage of ammonia is given after cooling the equilibrium mixture by the Haber process?

  • 20 percent
  • 33 percent
  • 100 percent
  • 98 percent

Due to the high concentration of reactants, the rate of the forward reaction is

  • lowest
  • moderate
  • highest
  • minimal

In the reverse reaction SO3 decomposes in to

  • S and O
  • S and O2
  • S2 and O
  • SO2 and O2

Unit of the equilibrium constant for N2 + O2 2NO is

  • no units
  • mol dm-3
  • dm3mol-1
  • [mol dm-3]-2

What is represented by each figure within a square bracket in the equilibrium expression?

  • concentration in mol.dm-3
  • volume of products
  • mass of products
  • mass of reactants

Kf and Kr are

  • equilibrium constants
  • reaction constants
  • chemical constants
  • rate constants

Substances which increase the rate of a chemical reaction are called

  • proteins
  • single cell protein
  • enzymes
  • catalysts

The ratio of the product of the concentration of products to the product of the concentration of reactants is called

  • equilibrium constant
  • equilibrium ratio
  • reverse reaction
  • forward reaction

In equilibrium constant expression, the concentration of reactants is taken in/on the

  • right side
  • left side
  • numerator
  • denominator

Unit of the equilibrium constant for CO + 2H2 CH3OH is

  • no units
  • mol dm-3
  • dm3mol-1
  • [mol dm-3]-2

A substance which increases the rate of reaction is called

  • catalyst
  • reactant
  • product
  • coordinator

If the concentration, temperature, and pressure is changed, the system responds in a way that

  • follows the change
  • opposes the change
  • does not change at all
  • encourages the change

The conditions for equilibrium of concentration of reactant and products will be the same if

  • temperature is constant
  • pressure or volume is constant
  • concentration of products and reactants are same
  • all of above

A reversible reaction

  • always completes
  • never goes to completion
  • spontaneous reactions
  • non spontaneous reactions

What is the term used for a state of a chemical reaction in which forward and reverse reactions take place at the same rate?

  • chemical equilibrium
  • stable reaction
  • reversible reaction
  • forward reaction

Which of the following has made it possible to get the maximum amount of products?

  • Le Chatellier's principle
  • Charle's law
  • Boyle's law
  • Snell's law

Unit of the equilibrium constant for N2O4 2NO2 is

  • mol dm-4
  • mol dm-3
  • dm3mol-1
  • mol dm-3

Which of the following statements about the equilibrium constant is not true?

  • it is very useful
  • it is independent of the initial concentration of reactants
  • it does not depend upon temperature
  • it depends upon temperature

The reactions in which reactants react to form products and simultaneously products reverse back into reactants are called

  • reversible reactions
  • irreversible reaction
  • spontaneous reactions
  • non spontaneous reactions
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