Stoichiometry Subcategories

Stoichiometry

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

A. Neutrons and protons
B. Protons and electrons
C. Neutrons and electrons
D. Both A. & B.

2 litres of nitrogen at N.T.P. weighs ______________ gms ?

A. 14
B. 2.5
C. 28
D. 1.25

One of the specific gravity scales is “Brix” (used specifically for sugar solution). It is defined as ______________?

A. Brix = (400/G) – 400
B. Brix = 200 (G-1)
C. Brix = 145 – (145/G)
D. None of these

Fusion point of a basic refractory material is________________?

A. Reduced by the addition of acid oxides
B. Increased by the addition of acid oxides
C. Not affected by the addition of acid oxides
D. Always less than 1000°C

Refractoriness/fusion points of ‘Superduty’ refractories is _____________ °C?

A. 1520-1630
B. 1630-1670
C. > 1730
D. > 2000

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_______________?

A. 0
B. 1
C. 2
D. 3

A bypass stream in a chemical process is useful, because it___________________?

A. Facilitates better control of the process
B. Improves the conversion
C. Increases the yield of products
D. None of these

Silica bricks are never used for lining the_________________?

A. Beehive coke ovens
B. By-product coke ovens
C. Dome of blast furnace stoves
D. Roof of open hearth furnace

The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the_______________?

A. Nature of both the gas & the liquid
B. Temperature
C. Total pressure
D. None of these

Refractory bricks with lower permeability is produced by using _________________?

A. Higher firing temperature
B. Higher moulding pressure
C. Finer grog size
D. All A., B. and C.