Stoichiometry

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

Byadmin March 4, 2019August 24, 2021

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

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

Stoichiometry

The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?

The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?

A. Doubled
B. Halved
C. Trebled
D. Unpredictable

Read More The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?
Stoichiometry

A reduction process is accompanied with increase in the_______________?

A reduction process is accompanied with increase in the_______________?

A. Number of electrons
B. Oxidation number
C. Both A. & B.
D. Neither A. nor B.

Read More A reduction process is accompanied with increase in the_______________?
Stoichiometry

Which of the following holds good for a solution obeying Raoult’s law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing) ?

Which of the following holds good for a solution obeying Raoult’s law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing) ?

A. ΔH = 1 (+ ve) and Δ V = -ve
B. ΔH = 0
C. ΔV = 0
D. Both B. and C.

Read More Which of the following holds good for a solution obeying Raoult’s law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing) ?
Stoichiometry

Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?

Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?

A. 46
B. 92
C. -23
D. -92

Read More Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?
Stoichiometry

Unit of mass velocity is___________________?

Unit of mass velocity is___________________?

A. kg/m.hr
B. kg/m2.hr
C. kg/hr
D. kg/m2

Read More Unit of mass velocity is___________________?
Stoichiometry

A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?

A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?

A. Atomic weight of the metal is 4
B. Equivalent weight of the metal is 4
C. Atomic weight of the metal is 2
D. Equivalent weight of the metal is 8

Read More A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?