Stoichiometry MCQs

Question 1

Pick out the wrong statement:

Accepted Answer

Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture

Answer

Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve

Answer

At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite

Answer

Clapeyron equation is given by, $$\frac{{{	ext{dP}}}}{{{	ext{dT}}}} = \frac{\lambda }{{{	ext{T}}\left( {{{	ext{V}}_{	ext{G}}} - {{	ext{V}}_{	ext{L}}}} ight)}};$$ where, P = vapor pressure, T = absolute temperature, $$\lambda $$ = latent heat of vaporisation, V G and V L = volumes of gas and liquid respectively

Question 2

'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

Accepted Answer

Temperature vs. log (vapor pressure)

Answer

Vapor pressure vs. log (temperature)

Answer

Log (temperature) vs. log (vapor pressure)

Answer

Vapor pressure vs. temperature

Question 3

Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is

Accepted Answer

0

Answer

1

Answer

2

Answer

3

Question 4

Which of the following is not a unit of kinematic viscosity?

Accepted Answer

Poise

Answer

Stoke

Answer

Cm 2 /second

Answer

None of these

Question 5

Pick out the wrong unit conversion of calorific value.

Accepted Answer

1 BTU/lb = 2.3 kcal/kg

Answer

1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg

Answer

1 BTU/ft 3 = 8.9 kcal/m 3 = 0.038 MJ/m 3

Answer

1 kcal/m 3 = 0.1124 BTU/ft 3

Question 6

Which of the following is not a unit of pressure?

Accepted Answer

Parsec

Answer

Kilo-pascal

Answer

Bar

Answer

Newton/metre 2

Question 7

The evaporation of aqueous solution of sugar causes its molarity to

Accepted Answer

Increase

Answer

Decrease

Answer

Remain unchanged

Answer

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

Question 8

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

Accepted Answer

Both B & C

Answer

Kcal/kg-mole.°C

Answer

Btu/lb-mole.°R

Answer

Kcal/kg-mole.°K

Question 9

Number of gm moles of solute dissolved in 1 kg of solvent is called its

Accepted Answer

Molality

Answer

Normality

Answer

Molarity

Answer

Formality