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Q1. | The osmotic pressure of a solution increases, if its __________ is decreased. |

A. | volume [Wrong Answer] |

B. | solute concentration [Wrong Answer] |

C. | temperature [Wrong Answer] |

D. | none of these [Correct Answer] |

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Explanation:-
Answer : DDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Pick out the wrong statement.

One kg-mole of an ideal gas occupies 22.4 m

^{3}at N.T.P.

One lb-mole of an ideal gas occupies 359 ft

^{3}at N.T.P.

One gm-mole of an ideal gas occupies 22.4 litres (i.e., 22400 c.c) at N.T.P.

Density of dry air at N.T.P. is 1 gm/litre.

⇒ The most convenient way of expressing solution concentration is in terms of

mole fraction

normality

molality

molarity

⇒ Pick out the wrong statement.

To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg.

1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25.

A gas bubble at a pressure of

*P*is passed through a solvent with a saturation vapour pressure of

_{g}*Ps*. If the time of passage of the bubble is long and air is insoluble in the solvent, the mole fraction of solvent in the bubble will be equal to

*P*/

_{s}*P*.

_{g}A supersaturated solution of a sparingly soluble solute, at a concentration of

*C*, is being fed to a crystalliser at a volumetric flow rate of

*V*. The solubility .of the solute is

*C*. The output rate of solids from an efficient crystalliser is (

_{1}*C*+

*C*)

_{1}*V*.

⇒ __________ kg of CaC0

_{3}on heating will give 56 kg of CaO.

56 .

100

144

1000

⇒ 1 Pascal (unit of pressure) is equal to __________ N/m

^{2}.

10

1

0.1

1000

⇒ 1m

^{3}is approximately equal to

28 litres

35 ft

^{3}

4.5 litres

4.5 ft

^{3}

⇒ If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

10

20

70

100

⇒ The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation

increases with pressure rise.

decreases with increasing pressure.

becomes zero at the critical point.

both (b) & (c).

⇒ The value of Trouton's ratio (

*λ*/

_{b}*T*) for a number of substances is 21 (where,

_{b}*λ*= molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and

*b**T*= normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids.

_{b}polar

non-polar

both (a) & (b)

neither (a) nor (b)

⇒ 1 kg/cm

^{2}is equal to

760 torr

1KPa

10 metres of water column

1 metre of water column

⇒ Atomic __________ of an element is a whole number.

weight

number

volume

radius

⇒ 1 centipoise is equivalent to

1 gm/cm.second

1 centistoke

2.42 lb/ft.hr

2.42 lb/ft.second

⇒ __________ chart is a graph related to Antonie equation.

Ostwald

Cox

Mollier's

Enthalpy-concentration

⇒ Validity of the relationship, inputs = outputs, holds good for the system at steady state

with chemical reaction.

without chemical reaction.

without chemical reaction & losses.

none of these.

⇒ A chemical process is said to occur under unsteady state, if the

inventory changes do not take place.

ratio of streams entering/leaving are independent of time.

flow rates & composition both are time dependent.

none of these.

⇒ With increase in the solute concentration, the specific heat of aqueous solutions

increases

decreases

remains unchanged

either (a) or (b); depends on the type of solution

⇒ Heat of neutralisation of HCl and NaOH is - 57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.

57.46

-57.46

114.92

-28.73

⇒ Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m

^{3}. The diffusivity of aniline in air is 0.74xl0

^{-5}m

^{2}/s.The numerical value of mass transfer co-efficient is 7.4 x 10

^{-3}. Its units are

m/s

cm/s

mole/m

^{2}.s.Pa

kmole/m

^{2}.s.Pa

⇒ The value of the gas-law constant 'R' is 1.987

kcal/kg-mole.°C

Btu/lb-mole.°R

kcal/kg-mole.°K

both (b)& (c)

⇒ 1 bar is almost equal to __________ atmosphere.

1

10

100

1000

⇒ Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume 'X' diffuses twice as fast as another perfume 'Y'; what is the molecular weight of 'Y', if the vapor density of gas 'X' is 2 ? Molecular weight of gas 'X' is to be assumed to be 2.

2

4

8

16

⇒ The reverse process of fractional crystallisation is called

stripping

leaching

differential distillation

absorption

⇒ No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules

collide without loss of energy.

do work equal to loss in kinetic energy.

are above the inversion temperature.

exert no attractive force on each other.

⇒ The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.

increases

decreases

remains unchanged

either (a) or (b); depends on the liquid

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

same elevation in boiling point.

different elevation in boiling point.

elevation in boiling point in the ratio of their molecular weights.

none of these.

⇒ If pH value of a solution is 8, then its pOH value will be

6

1

7

10

⇒ The

*pH*value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be

basic

more acidic

neutral

of the same acidity

⇒ The pressure of '

*V*' litres of a dry gas is increased from 1 to 2 kgf/cm

^{2}at a constant temperature. The new volume will become

*V*/2

2

*V*

*V*/4

*V*

^{2}

⇒ The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the

phase rule

experimental data

emperical equations

theoretical equations

⇒ If 1.5 moles of oxygen combines with aluminium to form Al

_{2}O

_{3}, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.

27

54

5.4

2.7