Chemistry : Equilibrium

A catalyst is a substance which

• increases the equilibrium constant of the reaction

• increases equilibrium concentration of products

• does not alter the reaction mechanism

• changes the activation energy of the reaction

Which of the following acids has the smallest dissociation constant?

• CH₃CHFCOOH

• FCH₂CH₂COOH

• BrCH₂CH₂COOH

• CH₃CHBrCOOH

A liquid is in equilibrium with its vapour at it's boiling point. On the average, the molecules in two phases have equal

• inter- molecular forces

• potential energy

• kinetic energy

• total energy

For the chemical reaction 3X(g)+ Y(g)$\rightleftharpoons$ X₃Y (g), the amount of X₃Y at equilibrium is affected by

• temperature and pressure

• temperature only

• pressure only

• temperature, pressure and catalyst

The pair of compound which cannot exists together in solution is

• NaHCO₃ and NaOH

• Na₂CO₃ and NHCO₃

• Na₂CO₃ and NaOH

• NaHCO₃ and NaCl

In homogeneous catalysis

• the reactants, catalyst and products are in the same phase.

• the catalyst and reactants are in the same phase.

• the catalyst and products are in the same phase.

• the reactants and products are in the same phase.

Which one of the following pair shows Buffer's solution?

• NaCl + NaOH

• CH₃COONa + CH₃COOH

• CH₃COOH + CH₃COONH₄

• H₂SO₄ + CuSO₄

Which of the following chloride is water insoluble?

• HCl

• AgCl

• Both 'a' and 'b'

• None of these

0.005 M acid solution has 5 pH. The percentage ionisation of acid is :

• 0.8%

• 0.6%

• 0.4%

• 0.2%

CH₃COOH is weaker acid than H₂SO₄.It is due to:

• more ionization

• less ionization

• covalent bond

• electrovalent bond