Stoichiometry MCQs

Question 1

Internal energy of a substance comprises of the __________ energy.

Accepted Answer

All of the above

Answer

Vibrational

Answer

Rotational

Answer

Translational

Question 2

Pick out the wrong statement:

Accepted Answer

The integral heat of solution of either components can not be calculated from heat of mixing data

Answer

The average value of heat of neutralisation of dilute solutions of weak acids and bases is much less compared to that for strong acids and bases

Answer

The standard heat of solution of the hydrate of a substance is the difference between the heat of solution of the anhydrous substance and its heat of hydration

Answer

The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the nature & amount of the solute & the solvent, on the temperature & on the initial & final concentrations of the solution

Question 3

In osmosis through a semi-permeable membrane, diffusion of the

Accepted Answer

Solvent is from low concentration to high concentration region

Answer

Solvent is from high concentration to low concentration region

Answer

Solute takes place

Answer

None of these

Question 4

For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.

Accepted Answer

Both A & B

Answer

Integral

Answer

Differential

Answer

Neither A nor B

Question 5

The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface. This statement pertaining to the solubility of gases in liquid is the __________ law.

Accepted Answer

Henry's

Answer

Raoult's

Answer

Amgat's

Answer

None of these

Question 6

Disappearance of snow in subzero weather exemplifies the process of

Accepted Answer

Sublimation

Answer

Evaporation

Answer

Vaporisation

Answer

Melting

Question 7

The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the

Accepted Answer

Percentage saturation

Answer

Relative humidity

Answer

Relative saturation

Answer

None of these

Question 8

Which of the following gases is the most soluble in water?

Accepted Answer

NH 3

Answer

CO 2

Answer

H 2 S

Answer

CH 4

Question 9

Kopp's rule is helpful in finding the

Accepted Answer

Heat capacities of solids

Answer

Heat capacities of gases

Answer

Molal heat capacities of gases

Answer

Activation energy