STOICHIOMETRY QUIZ

°API gravity of water at N.T.P. is about

10

100

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Dissolving a solute in a solvent does not change its

None of these

Vapour pressure

Specific heat

Viscosity

TRUE ANSWER : ?
YOUR ANSWER : ?

For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.

Humidity

Wet bulb temperature

Dry bulb temperature

Relative saturation

TRUE ANSWER : ?
YOUR ANSWER : ?

1 Kcal/kg. °C is equivalent to __________ BTU/lb. °F.

4.97

None of these

2.42

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

Yield enhancement

Heat conservation

None of these

Product enrichment

TRUE ANSWER : ?
YOUR ANSWER : ?

The evaporation of aqueous solution of sugar causes its molarity to

Either A or B; depends on the concentration of the solution.

increase.

Remain unchanged.

Decrease.

TRUE ANSWER : ?
YOUR ANSWER : ?

A gaseous mixture contains 14 kg of N₂, 16 kg of O₂ and 17 kg of NH₃. The mole fraction of oxygen is

0.33

0.47

0.16

0.66

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick out the wrong statement about the recycle stream in a process.

Recycling in a process does not help in getting higher extent of reaction

Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants

The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio

Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column

TRUE ANSWER : ?
YOUR ANSWER : ?

One micron is equal to

10⁻⁴ cm

10⁻⁴ mm

Both B & C

10⁻⁶ m

TRUE ANSWER : ?
YOUR ANSWER : ?

The vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is

0.2

0.4

0.6

0.8

TRUE ANSWER : ?
YOUR ANSWER : ?