Stoichiometry MCQ Questions & Answers | Chemical Engineering

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

A solution with reasonably permanent pH is called a/an __________ solution.

A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are X_c and X_s respectively. Which of the following statement is correct?

pH value of an alkaline solution is

A very dilute solution is prepared by dissolving 'x₁' mole of solute in 'x₂' mole of a solvent. The mole fraction of solute is approximately equal to

Heat of solution in a system in which both solute and solvent are liquids is termed as

Mass number of an atom is the sum of the numbers of

At standard conditions,
N₂ + 2O₂ ⇋ 2NO₂; ΔG° = 100 kJ/mole
NO + $$\frac{1}{2}$$O₂ ⇋ 2NO₂; ΔG° = -35 kJ/mole
The standard free energy of formation of NO in kJ/mole is

Pick out the wrong statement:

The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.