Category: Stoichiometry

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

Hamad Stoichiometry 02/11/2021

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

How much O2 can be obtained from 90 kg of water ?

Hamad Stoichiometry 31/10/2021

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A. 32 kg
B. 80 kg
C. 64 kg
D. 90 kg

One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The latent heat of condensation (kJ/kg-1 ) under these conditions is___________________?

Hamad Stoichiometry 29/10/2021

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A. 40732
B. 2676
C. 2263
D. 540

Hot metal runner in blast furnace are lined with ______________ bricks?

Hamad Stoichiometry 28/10/2021

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A. Silica
B. Carborundum
C. Fireclay
D. Magnesite

Which of the following is insensitive to changes in pressure ?

Hamad Stoichiometry 26/10/2021

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A. Heat of vaporisation
B. Melting point
C. Heat of fusion
D. Both B. and C.

Raoult’s law is obeyed by a _____________ solution?

Hamad Stoichiometry 25/10/2021

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A. Saturated
B. Molar
C. Normal
D. None of these

A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?

Hamad Stoichiometry 24/10/2021

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A. 380
B. 630
C. 760
D. 880

Addition of zircon to silica refractory brick improves its_________________?

Hamad Stoichiometry 24/10/2021

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A. Crushing strength
B. Resistance to slag attack
C. Both A. and B.
D. Neither A. nor B.

A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO2, 0.05 gm mole of oxygen and 0.80 gm mole of N2. What is its molecular weight ?

Hamad Stoichiometry 16/10/2021

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A. 28.6
B. 30.0
C. 30.6
D. 32.6

_____________ fuels require the maximum percentage of ‘excess air’ for complete combustion ?

Hamad Stoichiometry 12/10/2021

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A. Solid
B. Liquid
C. Gaseous
D. Nuclear