• 1

MCQExplainer

Asked: March 30, 2021In: Education

The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

• 1

thermodynamics

• 1

MCQExplainer

Asked: March 30, 2021In: Education

The enthalpy of vaporisation of a substance is 8400 J mol-1 and its boiling point is –173°C. The entropy change for vaporisation is :

• 1

thermodynamics

• 1

MCQExplainer

Asked: March 30, 2021In: Education

One mole of which of the following has the highest entropy?

• 1

thermodynamics

• 1

MCQExplainer

Asked: March 30, 2021In: Education

Third law of thermodynamics provides a method to evaluate which property?

• 1

thermodynamics

• 2

MCQExplainer

Asked: March 27, 2021In: Education

A weak acid HX has the dissociation constant 1 × 10-5 M. It forms a salt NaX on reaction with alkali. The degree of hydrolysis of 0.1 M solution of NaX is

• 2

thermodynamics

• 1

MCQExplainer

Asked: March 27, 2021In: Education

The pH of a 10-10 M NaOH solution is nearest to

• 1

thermodynamics

• 1

MCQExplainer

Asked: March 27, 2021In: Education

What is the pH of a 0.10 M solution of barium hydroxide, Ba (OH)2?

• 1

thermodynamics

• 1

MCQExplainer

Asked: March 27, 2021In: Education

Which of the following aqueous solutions will have highest pH?

• 1

thermodynamics

• 1

MCQExplainer

Asked: March 27, 2021In: Education

A physician wishes to prepare a buffer solution at pH = 3.85 that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use?

• 1

thermodynamicsx

• 1

MCQExplainer

Asked: March 27, 2021In: Education

The solubility of Ca3​(PO4​​)2​ in water is y mol/L. Its solubility product is:

• 1

thermodynamics