The vapor pressure of a substance, at its melting point, is _____________ in the solid state as compared to that in the liquid state?

Byadmin March 4, 2019August 24, 2021

The vapor pressure of a substance, at its melting point, is _____________ in the solid state as compared to that in the liquid state?

A. Less
B. More
C. Same
D. Either A. or B.; depends on the nature of the substance

Stoichiometry

The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?

The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?

A. H2O > C2H5OH > CS2
B. CS2 > C2H5OH > H2O
C. H2O > CS2 > C2H5OH
D. CS2 > H2O > C2H5OH

Read More The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?
Stoichiometry

Dry air is a mixture of__________________?

Dry air is a mixture of__________________?

A. Vapors
B. Gases
C. Both A. & B.
D. Neither A. nor B.

Read More Dry air is a mixture of__________________?
Stoichiometry

Cp – Cv for an ideal gas is equal to________________?

Cp – Cv for an ideal gas is equal to________________?

A. R
B. R/2
C. 2R
D. 3R

Read More Cp – Cv for an ideal gas is equal to________________?
Stoichiometry

If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?

If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?

A. 10
B. 100
C. 1000
D. 10000

Read More If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?
Stoichiometry

No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?

No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?

A. Collide without loss of energy
B. Do work equal to loss in kinetic energy
C. Are above the inversion temperature
D. Exert no attractive force on each other

Read More No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?
Stoichiometry

Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?

Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?

A. Same elevation in boiling point
B. Different elevation in boiling point
C. Elevation in boiling point in the ratio of their molecular weights
D. None of these

Read More Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?

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