Which is a neutral refractory ?
Which is a neutral refractory ?
A. Graphite
B. Magnesite chrome
C. Silica
D. Magnesia
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One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = – 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about_____________________?
One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = – 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about_____________________?A. 0.19
B. 0.33
C. 0.40
D. 0.67Solutions which distil without change in composition are called________________?
Solutions which distil without change in composition are called________________?A. Ideal
B. Saturated
C. Supersaturated
D. AzeotropicIn general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute?
In general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute?A. Increase
B. Decrease
C. Remain unchanged
D. None of these1 kg/cm2 is equal to________________?
1 kg/cm2 is equal to________________?A. 760 torr
B. 1 KPa
C. 10 metres of water column
D. 1 metre of water columnAvogadro number is the number of molecules in one ____________ of a gas?
Avogadro number is the number of molecules in one ____________ of a gas?A. gram
B. Kilogram
C. gm.mole
D. LitreWater content in ground refractory material to be shaped into bricks by hand moulding is about _____________ percent?
Water content in ground refractory material to be shaped into bricks by hand moulding is about _____________ percent?A. 5
B. 20
C. 40
D. 55