chemical engineering stoichiometry MCQs – Page 17

Practise multiple-choice questions from chemical engineering stoichiometry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering stoichiometry Mcqs
321. Heat of solution in a system in which both solute and solvent are liquids is termed as_________________?
comments icon0
A. Heat of mixing

B. Standard integral heat of solution

C. Heat of hydration

D. Heat of solvation

322. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?
comments icon0

A. Bubble point

B. Saturation temperature

C. Dew point

D. Both B. and C.
323. 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 vaporised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is_________________?
comments icon0
A. 0.6

B. 0.4

C. 0.8

D. 0.2

324. S.T.P. corresponds to _________________?
comments icon0

A. 760 torr & 0C

B. 1 atm. absolute pressure & 15.5C

C. 101.325 kPa gauge pressure & 15.5C

D. 760 mm Hg gauge pressure & 15.5C

325. Addition of a non-volatile solute to a pure solvent ____________________?
comments icon0

A. Increases its freezing point

B. Increases its boiling point

C. Decreases its freezing point

D. Both B. and C.
326. Elements in a periodic table are arranged in order of their__________________?
comments icon0

A. Metallic characteristics

B. Mass number

C. Atomic weight

D. Atomic number
327. The viscosity of water at room temperature may be around one ___________________?
comments icon0
A. Centipoise

B. Poise

C. Stoke

D. Both B. & C.

328. Volume occupied by one gm mole of a gas at S.T.P. is ____________________?
comments icon0

A. 359 litres

B. 22.4 c.c

C. 22.4 litres

D. 22400 litres

329. Unit of mass velocity is___________________?
comments icon0
A. kg/m2.hr

B. kg/m.hr

C. kg/m2

D. kg/hr

330. Disappearance of snow in subzero weather exemplifies the process of_________________?
comments icon0

A. Melting

B. Vaporisation

C. Evaporation

D. Sublimation
331. The equilibrium data of component A in the two phases B and C are given below. The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is ____________________?
comments icon0
A. 16.5

B. 16

C. 17

D. 15.5

332. In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest ?
comments icon0

A. 20 c.c acid and 25 c.c base

B. 30 c.c acid and 30 c.c base

C. 15 c.c acid and 35 c.c base

D. 35 c.c acid and 15 c.c base

333. In a neutral solution _________________?
comments icon0

A. H+ ions are absent

B. OH- ions are absent

C. Both H+ and OH- ions are present in very small but equal concentration

D. None of these

334. The value of (Cp Cv) for a real gas obeying Vander Walls equation is____________________?
comments icon0

A. R

B. > R

C. < R

D. 0.5 R

335. A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container___________________?
comments icon0

A. Cannot be determined

B. Will be 298 K

C. Will be greater than 298 K

D. Will be less than 298 K
336. 1 torr is equivalent to_________________?
comments icon0

A. 1 atm

B. 1 Pascal

C. 1 mm Hg

D. 1 mm wc

337. A limiting reactant is the one, which decides the ____________ in the chemical reaction?
comments icon0
A. Conversion

B. Equilibrium constant

C. Rate constant

D. None of these

338. Heat of neutralisation of HCl and NaOH is 57.46 kJ/Kg mole. The heat of ionisation of water will be _____________ kJ/Kg mole?
comments icon0

A. -57.46

B. 57.46

C. -28.73

D. 114.92

339. The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour________________?
comments icon0

A. Is not dependent on the temperature

B. Measures the depression in freezing point

C. Measures the elevation in boiling point

D. Is a function of the liquid phase composition
340. Pick out the wrong statement?
comments icon0

A. The average value of heat of neutralisation of dilute solutions of weak acids and bases is much

B. ure & amount of the solute & the solvent, on the temperature & on the initial & final

C. The integral heat of solution of either component cannot be calculated from heat of mixing

D. a</strong>

E. centrations of the solution

F. solution of the anhydrous substance and its heat of hydration