Stoichiometry - Study Mode

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[#151] Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the

(A) Nature of the liquid

(B) Nature of the gas

(C) Temperature of the liquid

(D) Total pressure

Correct Answer

(B) Nature of the gas

[#152] The heat capacity of most substances is greater for the __________ state.

(A) Solid

(B) Liquid

(C) Gaseous

(D) None of these

Correct Answer

(B) Liquid

[#153] Addition of a non-volatile solute to a pure solvent

(A) Increases its freezing point

(B) Increases its boiling point

(C) Decreases its freezing point

(D) Both B and C

Correct Answer

(D) Both B and C

[#154] A sample of well water contains 140 gm/m 3 Ca 2+ ions and 345 gm/m 3 Na + ions. The hardness of the sample of water, expressed in terms of equivalent CaCO 3 in gm/m 3 is (assuming atomic masses of Ca : 40, Na : 23, C : 12, O : 16)

(A) 350

(B) 485

(C) 140

(D) 345

Correct Answer

(A) 350

[#155] The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal __________ in the two phases.

(A) Potential energy

(B) Intermolecular forces

(C) Kinetic energy

(D) Total energy

Correct Answer

(C) Kinetic energy