Stoichiometry

Carborundum used for making crucibles for melting non-ferrous metals is chemically________________?

Byadmin March 4, 2019August 24, 2021

Carborundum used for making crucibles for melting non-ferrous metals is chemically________________?

A. Silicon carbide
B. Silicon nitride
C. Crystalline magnesia
D. Zirconium sulphate

Stoichiometry

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

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

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

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

Vapor pressure of water at 100°C is about _______________ bar?

Vapor pressure of water at 100°C is about _______________ bar?

A. 0.1013
B. 1.013
C. 10.13
D. 101.3

Read More Vapor pressure of water at 100°C is about _______________ bar?
Stoichiometry

Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?

Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?

A. Do not lose energy on collision
B. Are above the inversion temperature
C. Do not exert attractive force on each other
D. Do work equal to loss in kinetic energy

Read More Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?
Stoichiometry

The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?

The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?

A. 0.07
B. 0.09
C. 0.11
D. 0.13

Read More The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?
Stoichiometry

The elevation in boiling point of a solution is proportional to the ______________ of the solution?

The elevation in boiling point of a solution is proportional to the ______________ of the solution?

A. Molal concentration
B. Reciprocal of the molal concentration
C. Normality
D. Molarity

Read More The elevation in boiling point of a solution is proportional to the ______________ of the solution?
Stoichiometry

Maximum alumina content in high alumina refractory can be as high as ____________ percent?

Maximum alumina content in high alumina refractory can be as high as ____________ percent?

A. 30
B. 50
C. 70
D. 90

Read More Maximum alumina content in high alumina refractory can be as high as ____________ percent?

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